diff --git a/base/deprecated.jl b/base/deprecated.jl
index e44deb1f41054..1d2b29a697ca2 100644
--- a/base/deprecated.jl
+++ b/base/deprecated.jl
@@ -290,7 +290,7 @@ module DFT
     export FFTW
 end
 using .DFT
-for f in filter(s -> isexported(DFT, s), names(DFT, true))
+for f in filter(s -> isexported(DFT, s), names(DFT, all = true))
     @eval export $f
 end
 module DSP
@@ -495,14 +495,14 @@ end
 
 # PR #22088
 function hex2num(s::AbstractString)
-    depwarn("`hex2num(s)` is deprecated. Use `reinterpret(Float64, parse(UInt64, s, 16))` instead.", :hex2num)
+    depwarn("`hex2num(s)` is deprecated. Use `reinterpret(Float64, parse(UInt64, s, base = 16))` instead.", :hex2num)
     if length(s) <= 4
-        return reinterpret(Float16, parse(UInt16, s, 16))
+        return reinterpret(Float16, parse(UInt16, s, base = 16))
     end
     if length(s) <= 8
-        return reinterpret(Float32, parse(UInt32, s, 16))
+        return reinterpret(Float32, parse(UInt32, s, base = 16))
     end
-    return reinterpret(Float64, parse(UInt64, s, 16))
+    return reinterpret(Float64, parse(UInt64, s, base = 16))
 end
 export hex2num
 
@@ -1582,7 +1582,8 @@ end
 @deprecate catch_stacktrace(c_funcs::Bool)  stacktrace(catch_backtrace(), c_funcs)
 @deprecate catch_stacktrace()               stacktrace(catch_backtrace())
 
-@deprecate method_exists hasmethod
+@deprecate method_exists(f, t)        hasmethod(f, t)
+@deprecate method_exists(f, t, world) hasmethod(f, t, world = world)
 
 @deprecate object_id objectid
 
@@ -1631,6 +1632,24 @@ export readandwrite
 @deprecate indmin argmin
 @deprecate indmax argmax
 
+@deprecate Timer(timeout, repeat) Timer(timeout, interval = repeat)
+@deprecate Timer(callback, delay, repeat) Time(callback, delay, interval = repeat)
+@deprecate names(m, all) names(m, all = all)
+@deprecate names(m, all, imported) names(m, all = all, imported = imported)
+@deprecate code_native(io, f, types, syntax) code_native(io, f, types, syntax = syntax)
+@deprecate code_native(f, types, syntax) code_native(f, types, syntax = syntax)
+@deprecate eachmatch(re, str, overlap) eachmatch(re, str, overlap = overlap)
+@deprecate matchall(re, str, overlap) matchall(re, str, overlap = overlap)
+@deprecate chop(s, head) chop(s, head = head)
+@deprecate chop(s, head, tail) chop(s, head = head, tail = tail)
+@deprecate tryparse(T::Type{<:Integer}, s, base) tryparse(T, s, base = base)
+@deprecate parse(T::Type{<:Integer}, s, base) parse(T, s, base = base)
+@eval Filesystem @deprecate mkdir(path, mode) mkdir(path, mode = mode)
+@eval Filesystem @deprecate mkpath(path, mode) mkpath(path, mode = mode)
+@deprecate countlines(x, eol) countlines(x, eol = eol)
+@deprecate PipeBuffer(data, maxsize) PipeBuffer(data, maxsize = maxsize)
+@deprecate unsafe_wrap(T, pointer, dims, own) unsafe_wrap(T, pointer, dims, own = own)
+
 # END 0.7 deprecations
 
 # BEGIN 1.0 deprecations
diff --git a/base/docs/utils.jl b/base/docs/utils.jl
index b42fc3dbdead3..0ae186f5ea1d9 100644
--- a/base/docs/utils.jl
+++ b/base/docs/utils.jl
@@ -369,7 +369,7 @@ moduleusings(mod) = ccall(:jl_module_usings, Any, (Any,), mod)
 filtervalid(names) = filter(x->!contains(x, r"#"), map(string, names))
 
 accessible(mod::Module) =
-    [filter!(s -> !Base.isdeprecated(mod, s), names(mod, true, true));
+    [filter!(s -> !Base.isdeprecated(mod, s), names(mod, all = true, imported = true));
      map(names, moduleusings(mod))...;
      builtins] |> unique |> filtervalid
 
diff --git a/base/errorshow.jl b/base/errorshow.jl
index b4b579c0cc87d..de9f53fffb37f 100644
--- a/base/errorshow.jl
+++ b/base/errorshow.jl
@@ -234,7 +234,7 @@ function showerror(io::IO, ex::MethodError)
         end
     end
     if (ex.world != typemax(UInt) && hasmethod(ex.f, arg_types) &&
-        !hasmethod(ex.f, arg_types, ex.world))
+        !hasmethod(ex.f, arg_types, world = ex.world))
         curworld = ccall(:jl_get_world_counter, UInt, ())
         println(io)
         print(io, "The applicable method may be too new: running in world age $(ex.world), while current world is $(curworld).")
diff --git a/base/event.jl b/base/event.jl
index 92ae58248ebbb..8263fdb5e8e49 100644
--- a/base/event.jl
+++ b/base/event.jl
@@ -341,12 +341,12 @@ end
 ## timer-based notifications
 
 """
-    Timer(delay, repeat=0)
+    Timer(delay; interval = 0)
 
 Create a timer that wakes up tasks waiting for it (by calling [`wait`](@ref) on the timer object).
 
 Waiting tasks are woken after an intial delay of `delay` seconds, and then repeating with the given
-`repeat` interval in seconds. If `repeat` is equal to `0`, the timer is only triggered once. When
+`interval` in seconds. If `interval` is equal to `0`, the timer is only triggered once. When
 the timer is closed (by [`close`](@ref) waiting tasks are woken with an error. Use [`isopen`](@ref)
 to check whether a timer is still active.
 """
@@ -355,9 +355,9 @@ mutable struct Timer
     cond::Condition
     isopen::Bool
 
-    function Timer(timeout::Real, repeat::Real=0.0)
+    function Timer(timeout::Real; interval::Real = 0.0)
         timeout ≥ 0 || throw(ArgumentError("timer cannot have negative timeout of $timeout seconds"))
-        repeat ≥ 0 || throw(ArgumentError("timer cannot have negative repeat interval of $repeat seconds"))
+        interval ≥ 0 || throw(ArgumentError("timer cannot have negative repeat interval of $interval seconds"))
 
         this = new(Libc.malloc(_sizeof_uv_timer), Condition(), true)
         err = ccall(:uv_timer_init, Cint, (Ptr{Cvoid}, Ptr{Cvoid}), eventloop(), this)
@@ -374,7 +374,7 @@ mutable struct Timer
         ccall(:uv_update_time, Cvoid, (Ptr{Cvoid},), eventloop())
         ccall(:uv_timer_start,  Cint,  (Ptr{Cvoid}, Ptr{Cvoid}, UInt64, UInt64),
               this, uv_jl_timercb::Ptr{Cvoid},
-              UInt64(round(timeout * 1000)) + 1, UInt64(round(repeat * 1000)))
+              UInt64(round(timeout * 1000)) + 1, UInt64(round(interval * 1000)))
         return this
     end
 end
@@ -444,13 +444,13 @@ end
 
 # timer with repeated callback
 """
-    Timer(callback::Function, delay, repeat=0)
+    Timer(callback::Function, delay; interval = 0)
 
 Create a timer that wakes up tasks waiting for it (by calling [`wait`](@ref) on the timer object) and
 calls the function `callback`.
 
 Waiting tasks are woken and the function `callback` is called after an intial delay of `delay` seconds,
-and then repeating with the given `repeat` interval in seconds. If `repeat` is equal to `0`, the timer
+and then repeating with the given `interval` in seconds. If `interval` is equal to `0`, the timer
 is only triggered once. The function `callback` is called with a single argument, the timer itself.
 When the timer is closed (by [`close`](@ref) waiting tasks are woken with an error. Use [`isopen`](@ref)
 to check whether a timer is still active.
@@ -463,7 +463,7 @@ Here the first number is printed after a delay of two seconds, then the followin
 julia> begin
            i = 0
            cb(timer) = (global i += 1; println(i))
-           t = Timer(cb, 2, 0.2)
+           t = Timer(cb, 2, interval = 0.2)
            wait(t)
            sleep(0.5)
            close(t)
@@ -473,8 +473,8 @@ julia> begin
 3
 ```
 """
-function Timer(cb::Function, timeout::Real, repeat::Real=0.0)
-    t = Timer(timeout, repeat)
+function Timer(cb::Function, timeout::Real; interval::Real = 0.0)
+    t = Timer(timeout, interval = interval)
     waiter = Task(function()
         while isopen(t)
             success = try
diff --git a/base/file.jl b/base/file.jl
index 104e8cc411d2d..60721ba3e38cf 100644
--- a/base/file.jl
+++ b/base/file.jl
@@ -81,8 +81,15 @@ Temporarily changes the current working directory and applies function `f` befor
 """
 cd(f::Function) = cd(f, homedir())
 
+function checkmode(mode::Integer)
+    if !(0 <= mode <= 511)
+        throw(ArgumentError("Mode must be between 0 and 511 = 0o777"))
+    end
+    mode
+end
+
 """
-    mkdir(path::AbstractString, mode::Unsigned=0o777)
+    mkdir(path::AbstractString; mode::Unsigned = 0o777)
 
 Make a new directory with name `path` and permissions `mode`. `mode` defaults to `0o777`,
 modified by the current file creation mask. This function never creates more than one
@@ -90,28 +97,28 @@ directory. If the directory already exists, or some intermediate directories do
 this function throws an error. See [`mkpath`](@ref) for a function which creates all
 required intermediate directories.
 """
-function mkdir(path::AbstractString, mode::Unsigned=0o777)
+function mkdir(path::AbstractString; mode::Integer = 0o777)
     @static if Sys.iswindows()
         ret = ccall(:_wmkdir, Int32, (Cwstring,), path)
     else
-        ret = ccall(:mkdir, Int32, (Cstring, UInt32), path, mode)
+        ret = ccall(:mkdir, Int32, (Cstring, UInt32), path, checkmode(mode))
     end
     systemerror(:mkdir, ret != 0; extrainfo=path)
 end
 
 """
-    mkpath(path::AbstractString, mode::Unsigned=0o777)
+    mkpath(path::AbstractString; mode::Unsigned = 0o777)
 
 Create all directories in the given `path`, with permissions `mode`. `mode` defaults to
 `0o777`, modified by the current file creation mask.
 """
-function mkpath(path::AbstractString, mode::Unsigned=0o777)
+function mkpath(path::AbstractString; mode::Integer = 0o777)
     isdirpath(path) && (path = dirname(path))
     dir = dirname(path)
     (path == dir || isdir(path)) && return
-    mkpath(dir, mode)
+    mkpath(dir, mode = checkmode(mode))
     try
-        mkdir(path, mode)
+        mkdir(path, mode = mode)
     # If there is a problem with making the directory, but the directory
     # does in fact exist, then ignore the error. Else re-throw it.
     catch err
@@ -123,9 +130,6 @@ function mkpath(path::AbstractString, mode::Unsigned=0o777)
     end
 end
 
-mkdir(path::AbstractString, mode::Signed) = throw(ArgumentError("mode must be an unsigned integer; try 0o$mode"))
-mkpath(path::AbstractString, mode::Signed) = throw(ArgumentError("mode must be an unsigned integer; try 0o$mode"))
-
 """
     rm(path::AbstractString; force::Bool=false, recursive::Bool=false)
 
diff --git a/base/intfuncs.jl b/base/intfuncs.jl
index 3a98e9edd876a..906f9012cb07a 100644
--- a/base/intfuncs.jl
+++ b/base/intfuncs.jl
@@ -747,7 +747,7 @@ bitstring(x::Union{Int64,UInt64,Float64})      = bin(reinterpret(UInt64,x),64)
 bitstring(x::Union{Int128,UInt128})            = bin(reinterpret(UInt128,x),128)
 
 """
-    digits([T<:Integer], n::Integer, base::T=10, pad::Integer=1)
+    digits([T<:Integer], n::Integer; base::T = 10, pad::Integer = 1)
 
 Return an array with element type `T` (default `Int`) of the digits of `n` in the given
 base, optionally padded with zeros to a specified size. More significant digits are at
@@ -755,19 +755,19 @@ higher indices, such that `n == sum([digits[k]*base^(k-1) for k=1:length(digits)
 
 # Examples
 ```jldoctest
-julia> digits(10, 10)
+julia> digits(10, base = 10)
 2-element Array{Int64,1}:
  0
  1
 
-julia> digits(10, 2)
+julia> digits(10, base = 2)
 4-element Array{Int64,1}:
  0
  1
  0
  1
 
-julia> digits(10, 2, 6)
+julia> digits(10, base = 2, pad = 6)
 6-element Array{Int64,1}:
  0
  1
@@ -777,10 +777,11 @@ julia> digits(10, 2, 6)
  0
 ```
 """
-digits(n::Integer, base::T=10, pad::Integer=1) where {T<:Integer} = digits(T, n, base, pad)
+digits(n::Integer; base = base::Integer = 10, pad = pad::Integer = 1) =
+    digits(typeof(base), n, base = base, pad = pad)
 
-function digits(T::Type{<:Integer}, n::Integer, base::Integer=10, pad::Integer=1)
-    digits!(zeros(T, ndigits(n, base, pad)), n, base)
+function digits(T::Type{<:Integer}, n::Integer; base::Integer = 10, pad::Integer = 1)
+    digits!(zeros(T, ndigits(n, base, pad)), n, base = base)
 end
 
 """
@@ -792,7 +793,7 @@ hastypemax(::Base.BitIntegerType) = true
 hastypemax(::Type{T}) where {T} = applicable(typemax, T)
 
 """
-    digits!(array, n::Integer, base::Integer=10)
+    digits!(array, n::Integer; base::Integer = 10)
 
 Fills an array of the digits of `n` in the given base. More significant digits are at higher
 indices. If the array length is insufficient, the least significant digits are filled up to
@@ -800,14 +801,14 @@ the array length. If the array length is excessive, the excess portion is filled
 
 # Examples
 ```jldoctest
-julia> digits!([2,2,2,2], 10, 2)
+julia> digits!([2,2,2,2], 10, base = 2)
 4-element Array{Int64,1}:
  0
  1
  0
  1
 
-julia> digits!([2,2,2,2,2,2], 10, 2)
+julia> digits!([2,2,2,2,2,2], 10, base = 2)
 6-element Array{Int64,1}:
  0
  1
@@ -817,8 +818,8 @@ julia> digits!([2,2,2,2,2,2], 10, 2)
  0
 ```
 """
-function digits!(a::AbstractVector{T}, n::Integer, base::Integer=10) where T<:Integer
-    base < 0 && isa(n, Unsigned) && return digits!(a, convert(Signed, n), base)
+function digits!(a::AbstractVector{T}, n::Integer; base::Integer = 10) where T<:Integer
+    base < 0 && isa(n, Unsigned) && return digits!(a, convert(Signed, n), base = base)
     2 <= abs(base) || throw(ArgumentError("base must be ≥ 2 or ≤ -2, got $base"))
     hastypemax(T) && abs(base) - 1 > typemax(T) &&
         throw(ArgumentError("type $T too small for base $base"))
diff --git a/base/io.jl b/base/io.jl
index 13dd90446ad9f..d9d598df13737 100644
--- a/base/io.jl
+++ b/base/io.jl
@@ -975,7 +975,7 @@ function skipchars(predicate, io::IO; linecomment=nothing)
 end
 
 """
-    countlines(io::IO, eol::Char='\\n')
+    countlines(io::IO; eol::Char = '\\n')
 
 Read `io` until the end of the stream/file and count the number of lines. To specify a file
 pass the filename as the first argument. EOL markers other than `'\\n'` are supported by
@@ -993,11 +993,11 @@ julia> io = IOBuffer("JuliaLang is a GitHub organization.");
 julia> countlines(io)
 0
 
-julia> countlines(io, '.')
+julia> countlines(io, eol = '.')
 1
 ```
 """
-function countlines(io::IO, eol::Char='\n')
+function countlines(io::IO; eol::Char='\n')
     isascii(eol) || throw(ArgumentError("only ASCII line terminators are supported"))
     aeol = UInt8(eol)
     a = Vector{UInt8}(uninitialized, 8192)
@@ -1011,4 +1011,4 @@ function countlines(io::IO, eol::Char='\n')
     nl
 end
 
-countlines(f::AbstractString, eol::Char='\n') = open(io->countlines(io,eol), f)::Int
+countlines(f::AbstractString; eol::Char = '\n') = open(io->countlines(io, eol = eol), f)::Int
diff --git a/base/iobuffer.jl b/base/iobuffer.jl
index 4af144d824f89..a41bb4fe74590 100644
--- a/base/iobuffer.jl
+++ b/base/iobuffer.jl
@@ -115,7 +115,7 @@ IOBuffer(maxsize::Integer) = (x=IOBuffer(StringVector(maxsize), true, true, maxs
 # PipeBuffers behave like Unix Pipes. They are typically readable and writable, they act appendable, and are not seekable.
 
 """
-    PipeBuffer(data::Vector{UInt8}=UInt8[],[maxsize::Integer=typemax(Int)])
+    PipeBuffer(data::Vector{UInt8}=UInt8[]; maxsize::Integer = typemax(Int))
 
 An [`IOBuffer`](@ref) that allows reading and performs writes by appending.
 Seeking and truncating are not supported.
@@ -123,9 +123,9 @@ See [`IOBuffer`](@ref) for the available constructors.
 If `data` is given, creates a `PipeBuffer` to operate on a data vector,
 optionally specifying a size beyond which the underlying `Array` may not be grown.
 """
-PipeBuffer(data::Vector{UInt8}=UInt8[], maxsize::Int=typemax(Int)) =
+PipeBuffer(data::Vector{UInt8}=UInt8[]; maxsize::Int = typemax(Int)) =
     GenericIOBuffer(data,true,true,false,true,maxsize)
-PipeBuffer(maxsize::Integer) = (x = PipeBuffer(StringVector(maxsize),maxsize); x.size=0; x)
+PipeBuffer(maxsize::Integer) = (x = PipeBuffer(StringVector(maxsize), maxsize = maxsize); x.size=0; x)
 
 function copy(b::GenericIOBuffer)
     ret = typeof(b)(b.writable ? copy(b.data) : b.data,
diff --git a/base/libgit2/blob.jl b/base/libgit2/blob.jl
index c2186765c2ce1..d306ab96924bf 100644
--- a/base/libgit2/blob.jl
+++ b/base/libgit2/blob.jl
@@ -19,7 +19,7 @@ is binary and not valid Unicode.
 """
 function rawcontent(blob::GitBlob)
     ptr = ccall((:git_blob_rawcontent, :libgit2), Ptr{UInt8}, (Ptr{Cvoid},), blob.ptr)
-    copy(unsafe_wrap(Array, ptr, (length(blob),), false))
+    copy(unsafe_wrap(Array, ptr, (length(blob),), own = false))
 end
 
 """
diff --git a/base/loading.jl b/base/loading.jl
index 27fc4c2e82820..44104f658a4e3 100644
--- a/base/loading.jl
+++ b/base/loading.jl
@@ -1104,7 +1104,7 @@ function create_expr_cache(input::String, output::String, concrete_deps::typeof(
         close(in)
     catch ex
         close(in)
-        process_running(io) && Timer(t -> kill(io), 5.0) # wait a short time before killing the process to give it a chance to clean up on its own first
+        process_running(io) && Timer(t -> kill(io), interval = 5.0) # wait a short time before killing the process to give it a chance to clean up on its own first
         rethrow(ex)
     end
     return io
diff --git a/base/mpfr.jl b/base/mpfr.jl
index a77c68c46ed04..b983fc1172ceb 100644
--- a/base/mpfr.jl
+++ b/base/mpfr.jl
@@ -131,8 +131,8 @@ BigFloat(x::Union{UInt8,UInt16,UInt32}) = BigFloat(convert(Culong, x))
 BigFloat(x::Union{Float16,Float32}) = BigFloat(Float64(x))
 BigFloat(x::Rational) = BigFloat(numerator(x)) / BigFloat(denominator(x))
 
-function tryparse(::Type{BigFloat}, s::AbstractString, base::Int=0)
-    !isempty(s) && isspace(s[end]) && return tryparse(BigFloat, rstrip(s), base)
+function tryparse(::Type{BigFloat}, s::AbstractString; base::Integer = 0)
+    !isempty(s) && isspace(s[end]) && return tryparse(BigFloat, rstrip(s), base = base)
     z = BigFloat()
     err = ccall((:mpfr_set_str, :libmpfr), Int32, (Ref{BigFloat}, Cstring, Int32, Int32), z, s, base, ROUNDING_MODE[])
     err == 0 ? z : nothing
diff --git a/base/parse.jl b/base/parse.jl
index cf461142dba61..d17514ede97ed 100644
--- a/base/parse.jl
+++ b/base/parse.jl
@@ -5,7 +5,7 @@ import Base.Checked: add_with_overflow, mul_with_overflow
 ## string to integer functions ##
 
 """
-    parse(type, str, [base])
+    parse(type, str; base)
 
 Parse a string as a number. For `Integer` types, a base can be specified
 (the default is 10). For floating-point types, the string is parsed as a decimal
@@ -18,10 +18,10 @@ If the string does not contain a valid number, an error is raised.
 julia> parse(Int, "1234")
 1234
 
-julia> parse(Int, "1234", 5)
+julia> parse(Int, "1234", base = 5)
 194
 
-julia> parse(Int, "afc", 16)
+julia> parse(Int, "afc", base = 16)
 2812
 
 julia> parse(Float64, "1.2e-3")
@@ -31,9 +31,9 @@ julia> parse(Complex{Float64}, "3.2e-1 + 4.5im")
 0.32 + 4.5im
 ```
 """
-parse(T::Type, str, base=Int)
+parse(T::Type, str; base = Int)
 
-function parse(::Type{T}, c::Char, base::Integer=36) where T<:Integer
+function parse(::Type{T}, c::Char; base::Integer = 36) where T<:Integer
     a::Int = (base <= 36 ? 10 : 36)
     2 <= base <= 62 || throw(ArgumentError("invalid base: base must be 2 ≤ base ≤ 62, got $base"))
     d = '0' <= c <= '9' ? c-'0'    :
@@ -202,22 +202,18 @@ end
 end
 
 """
-    tryparse(type, str, [base])
+    tryparse(type, str; base)
 
 Like [`parse`](@ref), but returns either a value of the requested type,
 or [`nothing`](@ref) if the string does not contain a valid number.
 """
-tryparse(::Type{T}, s::AbstractString, base::Integer) where {T<:Integer} =
-    tryparse_internal(T, s, start(s), endof(s), check_valid_base(base), false)
-tryparse(::Type{T}, s::AbstractString) where {T<:Integer} =
-    tryparse_internal(T, s, start(s), endof(s), 0, false)
-
-function parse(::Type{T}, s::AbstractString, base::Integer) where T<:Integer
-    tryparse_internal(T, s, start(s), endof(s), check_valid_base(base), true)
+function tryparse(::Type{T}, s::AbstractString; base::Union{Nothing,Integer} = nothing) where {T<:Integer}
+    # Zero base means, "figure it out"
+    tryparse_internal(T, s, start(s), endof(s), base===nothing ? 0 : check_valid_base(base), false)
 end
 
-function parse(::Type{T}, s::AbstractString) where T<:Integer
-    tryparse_internal(T, s, start(s), endof(s), 0, true) # Zero means, "figure it out"
+function parse(::Type{T}, s::AbstractString; base::Union{Nothing,Integer} = nothing) where {T<:Integer}
+    tryparse_internal(T, s, start(s), endof(s), base===nothing ? 0 : check_valid_base(base), true)
 end
 
 ## string to float functions ##
diff --git a/base/pcre.jl b/base/pcre.jl
index d45252b3d5c5e..4938ffda38c1c 100644
--- a/base/pcre.jl
+++ b/base/pcre.jl
@@ -88,7 +88,7 @@ function get_ovec(match_data)
                 (Ptr{Cvoid},), match_data)
     n = ccall((:pcre2_get_ovector_count_8, PCRE_LIB), UInt32,
               (Ptr{Cvoid},), match_data)
-    unsafe_wrap(Array, ptr, 2n, false)
+    unsafe_wrap(Array, ptr, 2n, own = false)
 end
 
 function compile(pattern::AbstractString, options::Integer)
diff --git a/base/pointer.jl b/base/pointer.jl
index 2ed621c569d94..b0ded31b87a27 100644
--- a/base/pointer.jl
+++ b/base/pointer.jl
@@ -68,7 +68,7 @@ unsafe_convert(::Type{Ptr{T}}, a::AbstractArray{T}) where {T} = error("conversio
 
 # unsafe pointer to array conversions
 """
-    unsafe_wrap(Array, pointer::Ptr{T}, dims, own=false)
+    unsafe_wrap(Array, pointer::Ptr{T}, dims; own = false)
 
 Wrap a Julia `Array` object around the data at the address given by `pointer`,
 without making a copy.  The pointer element type `T` determines the array
@@ -80,17 +80,17 @@ This function is labeled "unsafe" because it will crash if `pointer` is not
 a valid memory address to data of the requested length.
 """
 function unsafe_wrap(::Union{Type{Array},Type{Array{T}},Type{Array{T,N}}},
-                     p::Ptr{T}, dims::NTuple{N,Int}, own::Bool=false) where {T,N}
+                     p::Ptr{T}, dims::NTuple{N,Int}; own::Bool = false) where {T,N}
     ccall(:jl_ptr_to_array, Array{T,N}, (Any, Ptr{Cvoid}, Any, Int32),
           Array{T,N}, p, dims, own)
 end
 function unsafe_wrap(::Union{Type{Array},Type{Array{T}},Type{Array{T,1}}},
-                     p::Ptr{T}, d::Integer, own::Bool=false) where {T}
+                     p::Ptr{T}, d::Integer; own::Bool = false) where {T}
     ccall(:jl_ptr_to_array_1d, Array{T,1},
           (Any, Ptr{Cvoid}, Csize_t, Cint), Array{T,1}, p, d, own)
 end
-unsafe_wrap(Atype::Type, p::Ptr, dims::NTuple{N,<:Integer}, own::Bool=false) where {N} =
-    unsafe_wrap(Atype, p, convert(Tuple{Vararg{Int}}, dims), own)
+unsafe_wrap(Atype::Type, p::Ptr, dims::NTuple{N,<:Integer}; own::Bool = false) where {N} =
+    unsafe_wrap(Atype, p, convert(Tuple{Vararg{Int}}, dims), own = own)
 
 """
     unsafe_load(p::Ptr{T}, i::Integer=1)
diff --git a/base/precompile.jl b/base/precompile.jl
index 8bb4263961909..0a1707eb8075b 100644
--- a/base/precompile.jl
+++ b/base/precompile.jl
@@ -796,7 +796,7 @@ precompile(Tuple{typeof(Base.setup_stdio), Base.Pipe, Bool})
 precompile(Tuple{typeof(Base.setup_stdio), Base.IOStream, Bool})
 precompile(Tuple{Type{Base.Process}, Base.Cmd, Ptr{Cvoid}, Base.DevNullStream, Base.Pipe, Base.IOStream})
 precompile(Tuple{typeof(Base._jl_spawn), String, Array{String, 1}, Ptr{Cvoid}, Base.Process, Base.DevNullStream, Base.PipeEndpoint, Base.Filesystem.File})
-precompile(Tuple{Type{Base.Timer}, Int64, Float64})
+precompile(Tuple{Type{Base.Timer}, Int64})
 precompile(Tuple{typeof(Base.sleep), Int64})
 precompile(Tuple{typeof(Base._uv_hook_close), Base.PipeEndpoint})
 precompile(Tuple{typeof(Base.eltype), Type{Base.Union{IO, Nothing}}})
diff --git a/base/reflection.jl b/base/reflection.jl
index 85d42d1e39905..041e1e5f096bf 100644
--- a/base/reflection.jl
+++ b/base/reflection.jl
@@ -68,7 +68,7 @@ function fullname(m::Module)
 end
 
 """
-    names(x::Module, all::Bool=false, imported::Bool=false)
+    names(x::Module; all::Bool = false, imported::Bool = false)
 
 Get an array of the names exported by a `Module`, excluding deprecated names.
 If `all` is true, then the list also includes non-exported names defined in the module,
@@ -79,7 +79,8 @@ are also included.
 As a special case, all names defined in `Main` are considered \"exported\",
 since it is not idiomatic to explicitly export names from `Main`.
 """
-names(m::Module, all::Bool=false, imported::Bool=false) = sort!(ccall(:jl_module_names, Array{Symbol,1}, (Any, Cint, Cint), m, all, imported))
+names(m::Module; all::Bool = false, imported::Bool = false) =
+    sort!(ccall(:jl_module_names, Array{Symbol,1}, (Any, Cint, Cint), m, all, imported))
 
 isexported(m::Module, s::Symbol) = ccall(:jl_module_exports_p, Cint, (Any, Any), m, s) != 0
 isdeprecated(m::Module, s::Symbol) = ccall(:jl_is_binding_deprecated, Cint, (Any, Any), m, s) != 0
@@ -591,7 +592,7 @@ function _subtypes(m::Module, x::Union{DataType,UnionAll},
         return sts
     end
     xt = xt::DataType
-    for s in names(m, true)
+    for s in names(m, all = true)
         if isdefined(m, s) && !isdeprecated(m, s)
             t = getfield(m, s)
             if isa(t, DataType)
@@ -918,15 +919,15 @@ code_llvm(@nospecialize(f), @nospecialize(types=Tuple)) = code_llvm(STDOUT, f, t
 code_llvm_raw(@nospecialize(f), @nospecialize(types=Tuple)) = code_llvm(STDOUT, f, types, false)
 
 """
-    code_native([io=STDOUT,], f, types, syntax=:att)
+    code_native([io=STDOUT,], f, types; syntax = :att)
 
 Prints the native assembly instructions generated for running the method matching the given
 generic function and type signature to `io`.
 Switch assembly syntax using `syntax` symbol parameter set to `:att` for AT&T syntax or `:intel` for Intel syntax.
 """
-code_native(io::IO, @nospecialize(f), @nospecialize(types=Tuple), syntax::Symbol=:att) =
+code_native(io::IO, @nospecialize(f), @nospecialize(types=Tuple); syntax::Symbol = :att) =
     print(io, _dump_function(f, types, true, false, false, false, syntax))
-code_native(@nospecialize(f), @nospecialize(types=Tuple), syntax::Symbol=:att) = code_native(STDOUT, f, types, syntax)
+code_native(@nospecialize(f), @nospecialize(types=Tuple); syntax::Symbol = :att) = code_native(STDOUT, f, types, syntax = syntax)
 code_native(::IO, ::Any, ::Symbol) = error("illegal code_native call") # resolve ambiguous call
 
 # give a decent error message if we try to instantiate a staged function on non-leaf types
@@ -1082,7 +1083,7 @@ function parentmodule(@nospecialize(f), @nospecialize(types))
 end
 
 """
-    hasmethod(f, Tuple type, world=typemax(UInt)) -> Bool
+    hasmethod(f, Tuple type; world = typemax(UInt)) -> Bool
 
 Determine whether the given generic function has a method matching the given
 `Tuple` of argument types with the upper bound of world age given by `world`.
@@ -1093,7 +1094,7 @@ julia> hasmethod(length, Tuple{Array})
 true
 ```
 """
-function hasmethod(@nospecialize(f), @nospecialize(t), world=typemax(UInt))
+function hasmethod(@nospecialize(f), @nospecialize(t); world = typemax(UInt))
     t = to_tuple_type(t)
     t = signature_type(f, t)
     return ccall(:jl_method_exists, Cint, (Any, Any, UInt), typeof(f).name.mt, t, world) != 0
diff --git a/base/regex.jl b/base/regex.jl
index 716f5a379001e..06b3768159708 100644
--- a/base/regex.jl
+++ b/base/regex.jl
@@ -206,7 +206,7 @@ match(r::Regex, s::AbstractString, i::Integer) = throw(ArgumentError(
 ))
 
 """
-    matchall(r::Regex, s::AbstractString[, overlap::Bool=false]) -> Vector{AbstractString}
+    matchall(r::Regex, s::AbstractString; overlap::Bool = false]) -> Vector{AbstractString}
 
 Return a vector of the matching substrings from [`eachmatch`](@ref).
 
@@ -221,14 +221,14 @@ julia> matchall(rx, "a1a2a3a")
  "a1a"
  "a3a"
 
-julia> matchall(rx, "a1a2a3a", true)
+julia> matchall(rx, "a1a2a3a", overlap = true)
 3-element Array{SubString{String},1}:
  "a1a"
  "a2a"
  "a3a"
 ```
 """
-function matchall(re::Regex, str::String, overlap::Bool=false)
+function matchall(re::Regex, str::String; overlap::Bool = false)
     regex = compile(re).regex
     n = sizeof(str)
     matches = SubString{String}[]
@@ -262,8 +262,8 @@ function matchall(re::Regex, str::String, overlap::Bool=false)
     matches
 end
 
-matchall(re::Regex, str::SubString, overlap::Bool=false) =
-    matchall(re, String(str), overlap)
+matchall(re::Regex, str::SubString; overlap::Bool = false) =
+    matchall(re, String(str), overlap = overlap)
 
 # TODO: return only start index and update deprecation
 function findnext(re::Regex, str::Union{String,SubString}, idx::Integer)
@@ -416,12 +416,8 @@ function next(itr::RegexMatchIterator, prev_match)
     (prev_match, nothing)
 end
 
-function eachmatch(re::Regex, str::AbstractString, ovr::Bool)
-    RegexMatchIterator(re,str,ovr)
-end
-
 """
-    eachmatch(r::Regex, s::AbstractString[, overlap::Bool=false])
+    eachmatch(r::Regex, s::AbstractString; overlap::Bool=false])
 
 Search for all matches of a the regular expression `r` in `s` and return a iterator over the
 matches. If overlap is `true`, the matching sequences are allowed to overlap indices in the
@@ -440,14 +436,15 @@ julia> collect(m)
  RegexMatch("a1a")
  RegexMatch("a3a")
 
-julia> collect(eachmatch(rx, "a1a2a3a", true))
+julia> collect(eachmatch(rx, "a1a2a3a", overlap = true))
 3-element Array{RegexMatch,1}:
  RegexMatch("a1a")
  RegexMatch("a2a")
  RegexMatch("a3a")
 ```
 """
-eachmatch(re::Regex, str::AbstractString) = RegexMatchIterator(re,str)
+eachmatch(re::Regex, str::AbstractString; overlap = false) =
+    RegexMatchIterator(re, str, overlap)
 
 ## comparison ##
 
diff --git a/base/show.jl b/base/show.jl
index 4ba28a7bbb5c7..eea3869d2d400 100644
--- a/base/show.jl
+++ b/base/show.jl
@@ -1725,7 +1725,7 @@ directsubtype(a::Union, b::DataType) = directsubtype(a.a, b) || directsubtype(a.
 # Fallback to handle TypeVar's
 directsubtype(a, b::DataType) = false
 function dumpsubtypes(io::IO, x::DataType, m::Module, n::Int, indent)
-    for s in names(m, true)
+    for s in names(m, all = true)
         if isdefined(m, s) && !isdeprecated(m, s)
             t = getfield(m, s)
             if t === x || t === m
diff --git a/base/socket.jl b/base/socket.jl
index 127966e4c0036..46e423470353c 100644
--- a/base/socket.jl
+++ b/base/socket.jl
@@ -174,7 +174,7 @@ function parse(::Type{IPv4}, str::AbstractString)
         if length(f) > 1 && f[1] == '0'
             throw(ArgumentError(ipv4_leading_zero_error))
         else
-            r = parse(Int,f,10)
+            r = parse(Int, f, base = 10)
         end
         if i != length(fields)
             if r < 0 || r > 255
@@ -207,7 +207,7 @@ function parseipv6fields(fields,num_fields)
             cf -= 1
             continue
         end
-        ret |= UInt128(parse(Int,f,16))<<(cf*16)
+        ret |= UInt128(parse(Int, f, base = 16))<<(cf*16)
         cf -= 1
     end
     ret
@@ -542,7 +542,7 @@ function uv_recvcb(handle::Ptr{Cvoid}, nread::Cssize_t, buf::Ptr{Cvoid}, addr::P
                       ccall(:jl_sockaddr_host6, UInt32, (Ptr{Cvoid}, Ptr{UInt8}), addr, pointer(tmp))
                       IPv6(ntoh(tmp[1]))
                   end
-        buf = unsafe_wrap(Array, convert(Ptr{UInt8}, buf_addr), Int(nread), true)
+        buf = unsafe_wrap(Array, convert(Ptr{UInt8}, buf_addr), Int(nread), own = true)
         notify(sock.recvnotify, (addrout, buf))
     end
     ccall(:uv_udp_recv_stop, Cint, (Ptr{Cvoid},), sock.handle)
diff --git a/base/stream.jl b/base/stream.jl
index efb5e927045c3..778ba47bda452 100644
--- a/base/stream.jl
+++ b/base/stream.jl
@@ -773,7 +773,7 @@ function readbytes!(s::LibuvStream, a::Vector{UInt8}, nb::Int)
     else
         try
             stop_reading(s) # Just playing it safe, since we are going to switch buffers.
-            newbuf = PipeBuffer(a, #=maxsize=# nb)
+            newbuf = PipeBuffer(a, maxsize = nb)
             newbuf.size = 0 # reset the write pointer to the beginning
             s.buffer = newbuf
             write(newbuf, sbuf)
@@ -810,7 +810,7 @@ function unsafe_read(s::LibuvStream, p::Ptr{UInt8}, nb::UInt)
     else
         try
             stop_reading(s) # Just playing it safe, since we are going to switch buffers.
-            newbuf = PipeBuffer(unsafe_wrap(Array, p, nb), #=maxsize=# Int(nb))
+            newbuf = PipeBuffer(unsafe_wrap(Array, p, nb), maxsize = Int(nb))
             newbuf.size = 0 # reset the write pointer to the beginning
             s.buffer = newbuf
             write(newbuf, sbuf)
diff --git a/base/strings/util.jl b/base/strings/util.jl
index e477bfd42788a..91afc96de9997 100644
--- a/base/strings/util.jl
+++ b/base/strings/util.jl
@@ -70,7 +70,7 @@ startswith(a::Vector{UInt8}, b::Vector{UInt8}) = length(a) ≥ length(b) &&
 # TODO: fast endswith
 
 """
-    chop(s::AbstractString, head::Integer=0, tail::Integer=1)
+    chop(s::AbstractString; head::Integer = 0, tail::Integer = 1)
 
 Remove the first `head` and the last `tail` characters from `s`.
 The call `chop(s)` removes the last character from `s`.
@@ -85,16 +85,19 @@ julia> a = "March"
 julia> chop(a)
 "Marc"
 
-julia> chop(a, 1, 2)
+julia> chop(a, head = 1, tail = 2)
 "ar"
 
-julia> chop(a, 5, 5)
+julia> chop(a, head = 5, tail = 5)
 ""
 ```
 """
-chop(s::AbstractString) = SubString(s, start(s), prevind(s, endof(s)))
-chop(s::AbstractString, head::Integer, tail::Integer) =
+function chop(s::AbstractString; head::Integer = 0, tail::Integer = 1)
     SubString(s, nextind(s, start(s), head), prevind(s, endof(s), tail))
+end
+
+# TODO: optimization for the default case based on
+# chop(s::AbstractString) = SubString(s, start(s), prevind(s, endof(s)))
 
 """
     chomp(s::AbstractString)
diff --git a/base/summarysize.jl b/base/summarysize.jl
index ca516b1a6ac9a..185b43b851ff2 100644
--- a/base/summarysize.jl
+++ b/base/summarysize.jl
@@ -130,7 +130,7 @@ end
 function (ss::SummarySize)(obj::Module)
     haskey(ss.seen, obj) ? (return 0) : (ss.seen[obj] = true)
     size::Int = Core.sizeof(obj)
-    for binding in names(obj, true)
+    for binding in names(obj, all = true)
         if isdefined(obj, binding) && !isdeprecated(obj, binding)
             value = getfield(obj, binding)
             if !isa(value, Module) || parentmodule(value) === obj
diff --git a/base/task.jl b/base/task.jl
index bf02c44f9343f..41da005e17526 100644
--- a/base/task.jl
+++ b/base/task.jl
@@ -357,7 +357,7 @@ function timedwait(testcb::Function, secs::Float64; pollint::Float64=0.1)
     end
 
     if !testcb()
-        t = Timer(timercb, pollint, pollint)
+        t = Timer(timercb, pollint, interval = pollint)
         ret = fetch(done)
         close(t)
     else
diff --git a/doc/src/base/base.md b/doc/src/base/base.md
index e92cb39e08841..32d3c51589f44 100644
--- a/doc/src/base/base.md
+++ b/doc/src/base/base.md
@@ -323,7 +323,7 @@ Base.ExponentialBackOff
 ## Events
 
 ```@docs
-Base.Timer(::Function, ::Real, ::Real)
+Base.Timer(::Function, ::Real)
 Base.Timer
 Base.AsyncCondition
 Base.AsyncCondition(::Function)
diff --git a/doc/src/base/numbers.md b/doc/src/base/numbers.md
index 4be2570374488..033590a69c0f6 100644
--- a/doc/src/base/numbers.md
+++ b/doc/src/base/numbers.md
@@ -49,7 +49,7 @@ Base.base
 Base.digits
 Base.digits!
 Base.bitstring
-Base.parse(::Type, ::Any, ::Any)
+Base.parse
 Base.tryparse
 Base.big
 Base.signed
diff --git a/doc/src/devdocs/reflection.md b/doc/src/devdocs/reflection.md
index a7147f5d80736..d664ef0aeb92d 100644
--- a/doc/src/devdocs/reflection.md
+++ b/doc/src/devdocs/reflection.md
@@ -5,7 +5,7 @@ Julia provides a variety of runtime reflection capabilities.
 ## Module bindings
 
 The exported names for a `Module` are available using [`names(m::Module)`](@ref), which will return
-an array of [`Symbol`](@ref) elements representing the exported bindings. `names(m::Module, true)`
+an array of [`Symbol`](@ref) elements representing the exported bindings. `names(m::Module, all = true)`
 returns symbols for all bindings in `m`, regardless of export status.
 
 ## DataType fields
diff --git a/doc/src/manual/calling-c-and-fortran-code.md b/doc/src/manual/calling-c-and-fortran-code.md
index e2ec0d8a94c56..2058b46eda783 100644
--- a/doc/src/manual/calling-c-and-fortran-code.md
+++ b/doc/src/manual/calling-c-and-fortran-code.md
@@ -963,7 +963,7 @@ Currently, this is only supported for primitive types or other pointer-free (`is
 Any operation that throws an error is probably currently unimplemented and should be posted as
 a bug so that it can be resolved.
 
-If the pointer of interest is a plain-data array (primitive type or immutable struct), the function [`unsafe_wrap(Array, ptr,dims,[own])`](@ref)
+If the pointer of interest is a plain-data array (primitive type or immutable struct), the function [`unsafe_wrap(Array, ptr,dims, own = false)`](@ref)
 may be more useful. The final parameter should be true if Julia should "take ownership" of the
 underlying buffer and call `free(ptr)` when the returned `Array` object is finalized.  If the
 `own` parameter is omitted or false, the caller must ensure the buffer remains in existence until
diff --git a/doc/src/manual/functions.md b/doc/src/manual/functions.md
index f6ffc69821f35..c4ce2e98b7ae2 100644
--- a/doc/src/manual/functions.md
+++ b/doc/src/manual/functions.md
@@ -447,12 +447,12 @@ call will fail, just as it would if too many arguments were given explicitly.
 ## Optional Arguments
 
 In many cases, function arguments have sensible default values and therefore might not need to
-be passed explicitly in every call. For example, the library function [`parse(T, num, base)`](@ref)
+be passed explicitly in every call. For example, the library function [`parse(T, num, base = base)`](@ref)
 interprets a string as a number in some base. The `base` argument defaults to `10`. This behavior
 can be expressed concisely as:
 
 ```julia
-function parse(T, num, base=10)
+function parse(T, num; base = 10)
     ###
 end
 ```
@@ -461,13 +461,13 @@ With this definition, the function can be called with either two or three argume
 is automatically passed when a third argument is not specified:
 
 ```jldoctest
-julia> parse(Int,"12",10)
+julia> parse(Int, "12", base = 10)
 12
 
-julia> parse(Int,"12",3)
+julia> parse(Int, "12", base = 3)
 5
 
-julia> parse(Int,"12")
+julia> parse(Int, "12")
 12
 ```
 
diff --git a/examples/typetree.jl b/examples/typetree.jl
index f06c30b70e3ad..76736a2007ed2 100644
--- a/examples/typetree.jl
+++ b/examples/typetree.jl
@@ -74,7 +74,7 @@ end
 
 # examine all symbols in module and store those that are types
 function store_all_from(m::Module)
-    for s in names(m, true)
+    for s in names(m, all = true)
         if isdefined(m, s) && !Base.isdeprecated(m, s)
             t = getfield(m, s)
             if isa(t, Type) && t !== Union{}
diff --git a/stdlib/Dates/src/types.jl b/stdlib/Dates/src/types.jl
index bb856d790baf0..133225a300dcd 100644
--- a/stdlib/Dates/src/types.jl
+++ b/stdlib/Dates/src/types.jl
@@ -353,7 +353,8 @@ end
 
 import Base: sleep, Timer, timedwait
 sleep(time::Period) = sleep(toms(time) / 1000)
-Timer(time::Period, repeat::Period=Second(0)) = Timer(toms(time) / 1000, toms(repeat) / 1000)
+Timer(time::Period; interval::Period = Second(0)) =
+    Timer(toms(time) / 1000, interval = toms(interval) / 1000)
 timedwait(testcb::Function, time::Period) = timedwait(testcb, toms(time) / 1000)
 
 Base.OrderStyle(::Type{<:AbstractTime}) = Base.Ordered()
diff --git a/stdlib/FileWatching/test/runtests.jl b/stdlib/FileWatching/test/runtests.jl
index 8aef7119e2c71..560d66161e00c 100644
--- a/stdlib/FileWatching/test/runtests.jl
+++ b/stdlib/FileWatching/test/runtests.jl
@@ -125,14 +125,14 @@ end
 # issue #12473
 # make sure 1-shot timers work
 let a = []
-    Timer(t -> push!(a, 1), 0.01, 0)
+    Timer(t -> push!(a, 1), 0.01, interval = 0)
     sleep(0.2)
     @test a == [1]
 end
 
 # make sure repeating timers work
 @noinline function make_unrooted_timer(a)
-    t = Timer(0.0, 0.1)
+    t = Timer(0.0, interval = 0.1)
     finalizer(t -> a[] += 1, t)
     wait(t)
     e = @elapsed for i = 1:5
diff --git a/stdlib/REPL/src/REPLCompletions.jl b/stdlib/REPL/src/REPLCompletions.jl
index 82cdfefbb991e..8ef4ade2ddf33 100644
--- a/stdlib/REPL/src/REPLCompletions.jl
+++ b/stdlib/REPL/src/REPLCompletions.jl
@@ -21,8 +21,8 @@ function appendmacro!(syms, macros, needle, endchar)
     end
 end
 
-function filtered_mod_names(ffunc::Function, mod::Module, name::AbstractString, all::Bool=false, imported::Bool=false)
-    ssyms = names(mod, all, imported)
+function filtered_mod_names(ffunc::Function, mod::Module, name::AbstractString, all::Bool = false, imported::Bool = false)
+    ssyms = names(mod, all = all, imported = imported)
     filter!(ffunc, ssyms)
     syms = String[string(s) for s in ssyms]
     macros =  filter(x -> startswith(x, "@" * name), syms)
diff --git a/stdlib/REPL/src/emoji_symbols.jl b/stdlib/REPL/src/emoji_symbols.jl
index f8a5043f19f36..40f943cf246dd 100644
--- a/stdlib/REPL/src/emoji_symbols.jl
+++ b/stdlib/REPL/src/emoji_symbols.jl
@@ -11,7 +11,7 @@ for emj in emojis
     if '-' in unicode
         continue
     end
-    result[name] = "$(Char(parse(UInt32, unicode, 16)))"
+    result[name] = "$(Char(parse(UInt32, unicode, base = 16)))"
 end
 
 skeys = sort(collect(keys(result)))
diff --git a/stdlib/REPL/src/latex_symbols.jl b/stdlib/REPL/src/latex_symbols.jl
index b9b00b6bbb118..8f9c1ef8d5399 100644
--- a/stdlib/REPL/src/latex_symbols.jl
+++ b/stdlib/REPL/src/latex_symbols.jl
@@ -23,7 +23,7 @@ for c in child_nodes(root(xdoc))
         if latex !== nothing
             L = strip(content(latex))
             id = attribute(ce, "id")
-            U = string(map(s -> Char(parse(Int, s, 16)),
+            U = string(map(s -> Char(parse(Int, s, base = 16)),
                            split(id[2:end], "-"))...)
             if contains(L, r"^\\[A-Za-z]+$") && !isa(U,String)
                 if L in Ls
@@ -55,7 +55,7 @@ open(fname) do f
     for L in eachline(f)
         x = map(s -> rstrip(s, [' ','\t','\n']),
                 split(replace(L, r"[{}\"]+" => "\t"), "\t"))
-        c = Char(parse(Int, x[2], 16))
+        c = Char(parse(Int, x[2], base = 16))
         if (Base.is_id_char(c) || Base.isoperator(Symbol(c))) &&
            string(c) ∉ latex_strings && !isascii(c)
             tabcomname = escape_string(x[3])
diff --git a/stdlib/Random/src/DSFMT.jl b/stdlib/Random/src/DSFMT.jl
index e0a4d3d22328d..58e5ed23bb2ab 100644
--- a/stdlib/Random/src/DSFMT.jl
+++ b/stdlib/Random/src/DSFMT.jl
@@ -105,7 +105,7 @@ struct GF2X
     z::BigInt
 end
 
-GF2X(s::AbstractString) = GF2X(parse(BigInt, reverse(s), 16))
+GF2X(s::AbstractString) = GF2X(parse(BigInt, reverse(s), base = 16))
 Base.string(f::GF2X) = reverse(base(16, f.z))
 Base.:(==)(f::GF2X, g::GF2X) = f.z == g.z
 Base.copy(f::GF2X) = GF2X(MPZ.set(f.z))
diff --git a/stdlib/Random/src/RNGs.jl b/stdlib/Random/src/RNGs.jl
index 55c629a5b73d1..234b9b45c49ce 100644
--- a/stdlib/Random/src/RNGs.jl
+++ b/stdlib/Random/src/RNGs.jl
@@ -246,7 +246,7 @@ function make_seed()
         try
             seed = hash(seed, parse(UInt64,
                                     read(pipeline(`ifconfig`, `sha1sum`), String)[1:40],
-                                    16))
+                                    base = 16))
         end
         return make_seed(seed)
     end
diff --git a/stdlib/Serialization/src/Serialization.jl b/stdlib/Serialization/src/Serialization.jl
index b6afb86bf0537..ae1368d71da32 100644
--- a/stdlib/Serialization/src/Serialization.jl
+++ b/stdlib/Serialization/src/Serialization.jl
@@ -1193,7 +1193,7 @@ end
 
 deserialize(s::AbstractSerializer, ::Type{BigFloat}) = parse(BigFloat, deserialize(s))
 
-deserialize(s::AbstractSerializer, ::Type{BigInt}) = parse(BigInt, deserialize(s), 62)
+deserialize(s::AbstractSerializer, ::Type{BigInt}) = parse(BigInt, deserialize(s), base = 62)
 
 function deserialize(s::AbstractSerializer, t::Type{Regex})
     pattern = deserialize(s)
diff --git a/stdlib/SparseArrays/docs/src/index.md b/stdlib/SparseArrays/docs/src/index.md
index b0c7f34d409e7..d55c7f07cbdb9 100644
--- a/stdlib/SparseArrays/docs/src/index.md
+++ b/stdlib/SparseArrays/docs/src/index.md
@@ -213,10 +213,8 @@ SparseArrays.sprandn
 SparseArrays.nonzeros
 SparseArrays.rowvals
 SparseArrays.nzrange
-SparseArrays.dropzeros!(::SparseMatrixCSC, ::Bool)
-SparseArrays.dropzeros(::SparseMatrixCSC, ::Bool)
-SparseArrays.dropzeros!(::SparseVector, ::Bool)
-SparseArrays.dropzeros(::SparseVector, ::Bool)
+SparseArrays.dropzeros!
+SparseArrays.dropzeros
 SparseArrays.permute
 permute!{Tv, Ti, Tp <: Integer, Tq <: Integer}(::SparseMatrixCSC{Tv,Ti}, ::SparseMatrixCSC{Tv,Ti}, ::AbstractArray{Tp,1}, ::AbstractArray{Tq,1})
 ```
diff --git a/stdlib/SparseArrays/src/deprecated.jl b/stdlib/SparseArrays/src/deprecated.jl
index 87be3f449529c..76f9f461a9b1e 100644
--- a/stdlib/SparseArrays/src/deprecated.jl
+++ b/stdlib/SparseArrays/src/deprecated.jl
@@ -222,6 +222,11 @@ end
 import Base: asyncmap
 @deprecate asyncmap(f, s::AbstractSparseArray...; kwargs...) sparse(asyncmap(f, map(Array, s)...; kwargs...))
 
+#25395 keywords unlocked
+@deprecate dropzeros(x, trim)     dropzeros(x, trim = trim)
+@deprecate dropzeros!(x, trim)    dropzeros!(x, trim = trim)
+@deprecate droptol!(A, tol, trim) droptol!(A, tol, trim = trim)
+
 # END 0.7 deprecations
 
 # BEGIN 1.0 deprecations
diff --git a/stdlib/SparseArrays/src/sparsematrix.jl b/stdlib/SparseArrays/src/sparsematrix.jl
index 81b2e73758090..f710fa9afe501 100644
--- a/stdlib/SparseArrays/src/sparsematrix.jl
+++ b/stdlib/SparseArrays/src/sparsematrix.jl
@@ -1224,11 +1224,11 @@ function triu!(A::SparseMatrixCSC, k::Integer = 0, trim::Bool = true)
     fkeep!(A, (i, j, x) -> j >= i + k, trim)
 end
 
-droptol!(A::SparseMatrixCSC, tol, trim::Bool = true) =
+droptol!(A::SparseMatrixCSC, tol; trim::Bool = true) =
     fkeep!(A, (i, j, x) -> abs(x) > tol, trim)
 
 """
-    dropzeros!(A::SparseMatrixCSC, trim::Bool = true)
+    dropzeros!(A::SparseMatrixCSC; trim::Bool = true)
 
 Removes stored numerical zeros from `A`, optionally trimming resulting excess space from
 `A.rowval` and `A.nzval` when `trim` is `true`.
@@ -1236,9 +1236,9 @@ Removes stored numerical zeros from `A`, optionally trimming resulting excess sp
 For an out-of-place version, see [`dropzeros`](@ref). For
 algorithmic information, see `fkeep!`.
 """
-dropzeros!(A::SparseMatrixCSC, trim::Bool = true) = fkeep!(A, (i, j, x) -> x != 0, trim)
+dropzeros!(A::SparseMatrixCSC; trim::Bool = true) = fkeep!(A, (i, j, x) -> x != 0, trim)
 """
-    dropzeros(A::SparseMatrixCSC, trim::Bool = true)
+    dropzeros(A::SparseMatrixCSC; trim::Bool = true)
 
 Generates a copy of `A` and removes stored numerical zeros from that copy, optionally
 trimming excess space from the result's `rowval` and `nzval` arrays when `trim` is `true`.
@@ -1259,7 +1259,7 @@ julia> dropzeros(A)
   [3, 3]  =  1.0
 ```
 """
-dropzeros(A::SparseMatrixCSC, trim::Bool = true) = dropzeros!(copy(A), trim)
+dropzeros(A::SparseMatrixCSC; trim::Bool = true) = dropzeros!(copy(A), trim = trim)
 
 ## Find methods
 
diff --git a/stdlib/SparseArrays/src/sparsevector.jl b/stdlib/SparseArrays/src/sparsevector.jl
index e29b60de1419d..84cfb1844ccfc 100644
--- a/stdlib/SparseArrays/src/sparsevector.jl
+++ b/stdlib/SparseArrays/src/sparsevector.jl
@@ -1972,10 +1972,10 @@ function fkeep!(x::SparseVector, f, trim::Bool = true)
     x
 end
 
-droptol!(x::SparseVector, tol, trim::Bool = true) = fkeep!(x, (i, x) -> abs(x) > tol, trim)
+droptol!(x::SparseVector, tol; trim::Bool = true) = fkeep!(x, (i, x) -> abs(x) > tol, trim)
 
 """
-    dropzeros!(x::SparseVector, trim::Bool = true)
+    dropzeros!(x::SparseVector; trim::Bool = true)
 
 Removes stored numerical zeros from `x`, optionally trimming resulting excess space from
 `x.nzind` and `x.nzval` when `trim` is `true`.
@@ -1983,9 +1983,10 @@ Removes stored numerical zeros from `x`, optionally trimming resulting excess sp
 For an out-of-place version, see [`dropzeros`](@ref). For
 algorithmic information, see `fkeep!`.
 """
-dropzeros!(x::SparseVector, trim::Bool = true) = fkeep!(x, (i, x) -> x != 0, trim)
+dropzeros!(x::SparseVector; trim::Bool = true) = fkeep!(x, (i, x) -> x != 0, trim)
+
 """
-    dropzeros(x::SparseVector, trim::Bool = true)
+    dropzeros(x::SparseVector; trim::Bool = true)
 
 Generates a copy of `x` and removes numerical zeros from that copy, optionally trimming
 excess space from the result's `nzind` and `nzval` arrays when `trim` is `true`.
@@ -2006,7 +2007,7 @@ julia> dropzeros(A)
   [3]  =  1.0
 ```
 """
-dropzeros(x::SparseVector, trim::Bool = true) = dropzeros!(copy(x), trim)
+dropzeros(x::SparseVector; trim::Bool = true) = dropzeros!(copy(x), trim = trim)
 
 
 function _fillnonzero!(arr::SparseMatrixCSC{Tv, Ti}, val) where {Tv,Ti}
diff --git a/stdlib/SparseArrays/test/sparse.jl b/stdlib/SparseArrays/test/sparse.jl
index e9fed185f64a4..3bf048920dba5 100644
--- a/stdlib/SparseArrays/test/sparse.jl
+++ b/stdlib/SparseArrays/test/sparse.jl
@@ -1417,15 +1417,15 @@ end
         for Awithzeros in (Aposzeros, Anegzeros, Abothsigns)
             # Basic functionality / dropzeros!
             @test dropzeros!(copy(Awithzeros)) == A
-            @test dropzeros!(copy(Awithzeros), false) == A
+            @test dropzeros!(copy(Awithzeros), trim = false) == A
             # Basic functionality / dropzeros
             @test dropzeros(Awithzeros) == A
-            @test dropzeros(Awithzeros, false) == A
+            @test dropzeros(Awithzeros, trim = false) == A
             # Check trimming works as expected
             @test length(dropzeros!(copy(Awithzeros)).nzval) == length(A.nzval)
             @test length(dropzeros!(copy(Awithzeros)).rowval) == length(A.rowval)
-            @test length(dropzeros!(copy(Awithzeros), false).nzval) == length(Awithzeros.nzval)
-            @test length(dropzeros!(copy(Awithzeros), false).rowval) == length(Awithzeros.rowval)
+            @test length(dropzeros!(copy(Awithzeros), trim = false).nzval) == length(Awithzeros.nzval)
+            @test length(dropzeros!(copy(Awithzeros), trim = false).rowval) == length(Awithzeros.rowval)
         end
     end
     # original lone dropzeros test
diff --git a/stdlib/SparseArrays/test/sparsevector.jl b/stdlib/SparseArrays/test/sparsevector.jl
index 5d8cb9b8e377c..46cf1105cb31f 100644
--- a/stdlib/SparseArrays/test/sparsevector.jl
+++ b/stdlib/SparseArrays/test/sparsevector.jl
@@ -1050,15 +1050,15 @@ end
             for vwithzeros in (vposzeros, vnegzeros, vbothsigns)
                 # Basic functionality / dropzeros!
                 @test dropzeros!(copy(vwithzeros)) == v
-                @test dropzeros!(copy(vwithzeros), false) == v
+                @test dropzeros!(copy(vwithzeros), trim = false) == v
                 # Basic functionality / dropzeros
                 @test dropzeros(vwithzeros) == v
-                @test dropzeros(vwithzeros, false) == v
+                @test dropzeros(vwithzeros, trim = false) == v
                 # Check trimming works as expected
                 @test length(dropzeros!(copy(vwithzeros)).nzval) == length(v.nzval)
                 @test length(dropzeros!(copy(vwithzeros)).nzind) == length(v.nzind)
-                @test length(dropzeros!(copy(vwithzeros), false).nzval) == length(vwithzeros.nzval)
-                @test length(dropzeros!(copy(vwithzeros), false).nzind) == length(vwithzeros.nzind)
+                @test length(dropzeros!(copy(vwithzeros), trim = false).nzval) == length(vwithzeros.nzval)
+                @test length(dropzeros!(copy(vwithzeros), trim = false).nzind) == length(vwithzeros.nzind)
             end
         end
         # original dropzeros! test
diff --git a/stdlib/SuiteSparse/src/cholmod.jl b/stdlib/SuiteSparse/src/cholmod.jl
index b376d606585f0..8ba42d1d0c7d8 100644
--- a/stdlib/SuiteSparse/src/cholmod.jl
+++ b/stdlib/SuiteSparse/src/cholmod.jl
@@ -816,7 +816,7 @@ end
 
 function get_perm(F::Factor)
     s = unsafe_load(pointer(F))
-    p = unsafe_wrap(Array, s.Perm, s.n, false)
+    p = unsafe_wrap(Array, s.Perm, s.n, own = false)
     p .+ 1
 end
 get_perm(FC::FactorComponent) = get_perm(Factor(FC))
@@ -1074,9 +1074,9 @@ function SparseMatrixCSC{Tv,SuiteSparse_long}(A::Sparse{Tv}) where Tv
     end
 
     B = SparseMatrixCSC(s.nrow, s.ncol,
-        increment(unsafe_wrap(Array, s.p, (s.ncol + 1,), false)),
-        increment(unsafe_wrap(Array, s.i, (s.nzmax,), false)),
-        copy(unsafe_wrap(Array, s.x, (s.nzmax,), false)))
+        increment(unsafe_wrap(Array, s.p, (s.ncol + 1,), own = false)),
+        increment(unsafe_wrap(Array, s.i, (s.nzmax,), own = false)),
+        copy(unsafe_wrap(Array, s.x, (s.nzmax,), own = false)))
 
     if s.sorted == 0
         return SparseArrays.sortSparseMatrixCSC!(B)
@@ -1091,9 +1091,9 @@ function (::Type{Symmetric{Float64,SparseMatrixCSC{Float64,SuiteSparse_long}}})(
     end
 
     B = Symmetric(SparseMatrixCSC(s.nrow, s.ncol,
-        increment(unsafe_wrap(Array, s.p, (s.ncol + 1,), false)),
-        increment(unsafe_wrap(Array, s.i, (s.nzmax,), false)),
-        copy(unsafe_wrap(Array, s.x, (s.nzmax,), false))), s.stype > 0 ? :U : :L)
+        increment(unsafe_wrap(Array, s.p, (s.ncol + 1,), own = false)),
+        increment(unsafe_wrap(Array, s.i, (s.nzmax,), own = false)),
+        copy(unsafe_wrap(Array, s.x, (s.nzmax,), own = false))), s.stype > 0 ? :U : :L)
 
     if s.sorted == 0
         return SparseArrays.sortSparseMatrixCSC!(B.data)
@@ -1108,9 +1108,9 @@ function Hermitian{Tv,SparseMatrixCSC{Tv,SuiteSparse_long}}(A::Sparse{Tv}) where
     end
 
     B = Hermitian(SparseMatrixCSC(s.nrow, s.ncol,
-        increment(unsafe_wrap(Array, s.p, (s.ncol + 1,), false)),
-        increment(unsafe_wrap(Array, s.i, (s.nzmax,), false)),
-        copy(unsafe_wrap(Array, s.x, (s.nzmax,), false))), s.stype > 0 ? :U : :L)
+        increment(unsafe_wrap(Array, s.p, (s.ncol + 1,), own = false)),
+        increment(unsafe_wrap(Array, s.i, (s.nzmax,), own = false)),
+        copy(unsafe_wrap(Array, s.x, (s.nzmax,), own = false))), s.stype > 0 ? :U : :L)
 
     if s.sorted == 0
         return SparseArrays.sortSparseMatrixCSC!(B.data)
@@ -1264,7 +1264,7 @@ function getindex(A::Sparse{T}, i0::Integer, i1::Integer) where T
     r1 = Int(unsafe_load(s.p, i1) + 1)
     r2 = Int(unsafe_load(s.p, i1 + 1))
     (r1 > r2) && return zero(T)
-    r1 = Int(searchsortedfirst(unsafe_wrap(Array, s.i, (s.nzmax,), false),
+    r1 = Int(searchsortedfirst(unsafe_wrap(Array, s.i, (s.nzmax,), own = false),
         i0 - 1, r1, r2, Base.Order.Forward))
     ((r1 > r2) || (unsafe_load(s.i, r1) + 1 != i0)) ? zero(T) : unsafe_load(s.x, r1)
 end
diff --git a/stdlib/Test/src/Test.jl b/stdlib/Test/src/Test.jl
index 42c9bcbbfd367..0304317551c13 100644
--- a/stdlib/Test/src/Test.jl
+++ b/stdlib/Test/src/Test.jl
@@ -1281,7 +1281,7 @@ function detect_ambiguities(mods...;
     end
     ambs = Set{Tuple{Method,Method}}()
     for mod in mods
-        for n in names(mod, true, imported)
+        for n in names(mod, all = true, imported = imported)
             Base.isdeprecated(mod, n) && continue
             if !isdefined(mod, n)
                 println("Skipping ", mod, '.', n)  # typically stale exports
@@ -1322,7 +1322,7 @@ function detect_unbound_args(mods...;
                              recursive::Bool = false)
     ambs = Set{Method}()
     for mod in mods
-        for n in names(mod, true, imported)
+        for n in names(mod, all = true, imported = imported)
             Base.isdeprecated(mod, n) && continue
             if !isdefined(mod, n)
                 println("Skipping ", mod, '.', n)  # typically stale exports
diff --git a/test/asmvariant.jl b/test/asmvariant.jl
index 28b0fbd6f124b..999d37eccced4 100644
--- a/test/asmvariant.jl
+++ b/test/asmvariant.jl
@@ -14,13 +14,13 @@ if Sys.ARCH === :x86_64 || contains(string(Sys.ARCH), ix86)
     buf = IOBuffer()
     output=""
     #test that the string output is at&t syntax by checking for occurrences of '%'s
-    code_native(buf,linear_foo,(),:att)
+    code_native(buf,linear_foo,(), syntax = :att)
     output=String(take!(buf))
 
     @test contains(output,rgx)
 
     #test that the code output is intel syntax by checking it has no occurrences of '%'
-    code_native(buf,linear_foo,(),:intel)
+    code_native(buf,linear_foo,(), syntax = :intel)
     output=String(take!(buf))
 
     @test !contains(output,rgx)
diff --git a/test/bigint.jl b/test/bigint.jl
index f705ff7268d9f..b4886df8220c2 100644
--- a/test/bigint.jl
+++ b/test/bigint.jl
@@ -313,7 +313,7 @@ end
 @test Base.ndigits0zpb(big(0), big(rand(2:100))) == 0
 
 # digits with BigInt bases (#16844)
-@test digits(big(2)^256, big(2)^128) == [0, 0, 1]
+@test digits(big(2)^256, base = big(2)^128) == [0, 0, 1]
 
 @testset "conversion from float" begin
     @test BigInt(2.0) == BigInt(2.0f0) == BigInt(big(2.0)) == 2
diff --git a/test/core.jl b/test/core.jl
index a6c52bb51c414..ac686bd68c8e2 100644
--- a/test/core.jl
+++ b/test/core.jl
@@ -910,8 +910,8 @@ let A = [1]
 end
 
 # Module() constructor
-@test names(Module(:anonymous), true, true) == [:anonymous]
-@test names(Module(:anonymous, false), true, true) == [:anonymous]
+@test names(Module(:anonymous), all = true, imported = true) == [:anonymous]
+@test names(Module(:anonymous, false), all = true, imported = true) == [:anonymous]
 
 # exception from __init__()
 let didthrow =
@@ -4158,7 +4158,7 @@ ccall(:jl_array_grow_beg, Cvoid, (Any, UInt), d, 8)
 @test check_nul(d)
 f = unsafe_wrap(Array, pointer(d), length(d))
 @test !check_nul(f)
-f = unsafe_wrap(Array, ccall(:malloc, Ptr{UInt8}, (Csize_t,), 10), 10, true)
+f = unsafe_wrap(Array, ccall(:malloc, Ptr{UInt8}, (Csize_t,), 10), 10, own = true)
 @test !check_nul(f)
 end
 
diff --git a/test/file.jl b/test/file.jl
index e9d58c6971ff9..db749d8882e6c 100644
--- a/test/file.jl
+++ b/test/file.jl
@@ -1026,7 +1026,7 @@ function test_13559()
 end
 test_13559()
 end
-@test_throws ArgumentError mkpath("fakepath", -1)
+@test_throws ArgumentError mkpath("fakepath", mode = -1)
 
 # issue #22566
 # issue #24037 (disabling on FreeBSD)
diff --git a/test/intfuncs.jl b/test/intfuncs.jl
index 82c67f30e745e..f3db1ebc52437 100644
--- a/test/intfuncs.jl
+++ b/test/intfuncs.jl
@@ -142,14 +142,14 @@ end
     @test bitstring(Int128(3)) == "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011"
 end
 @testset "digits/base" begin
-    @test digits(4, 2) == [0, 0, 1]
-    @test digits(5, 3) == [2, 1]
+    @test digits(4, base = 2) == [0, 0, 1]
+    @test digits(5, base = 3) == [2, 1]
 
     @testset "digits/base with negative bases" begin
-        @testset "digits(n::$T, b)" for T in (Int, UInt, BigInt, Int32)
-            @test digits(T(8163), -10) == [3, 4, 2, 2, 1]
+        @testset "digits(n::$T, base = b)" for T in (Int, UInt, BigInt, Int32)
+            @test digits(T(8163), base = -10) == [3, 4, 2, 2, 1]
             if !(T<:Unsigned)
-                @test digits(T(-8163), -10) == [7, 7, 9, 9]
+                @test digits(T(-8163), base = -10) == [7, 7, 9, 9]
             end
         end
         @test [base(b, n)
diff --git a/test/misc.jl b/test/misc.jl
index 8e4173c8090b3..4d65bc6f18054 100644
--- a/test/misc.jl
+++ b/test/misc.jl
@@ -159,7 +159,7 @@ end
 
 # test that they don't introduce global vars
 global v11801, t11801, names_before_timing
-names_before_timing = names(@__MODULE__, true)
+names_before_timing = names(@__MODULE__, all = true)
 
 let t = @elapsed 1+1
     @test isa(t, Real) && t >= 0
@@ -178,7 +178,7 @@ v11801, t11801 = @timed sin(1)
 @test v11801 == sin(1)
 @test isa(t11801,Real) && t11801 >= 0
 
-@test names(@__MODULE__, true) == names_before_timing
+@test names(@__MODULE__, all = true) == names_before_timing
 
 # interactive utilities
 
diff --git a/test/numbers.jl b/test/numbers.jl
index df0530ee03bb3..101efaa43e987 100644
--- a/test/numbers.jl
+++ b/test/numbers.jl
@@ -2465,24 +2465,24 @@ ndigf(n) = Float64(log(Float32(n)))
 @test sum([Int128(1) Int128(2)]) == Int128(3)
 
 @testset "digits and digits!" begin
-    @test digits(24, 2) == [0, 0, 0, 1, 1]
-    @test digits(24, 2, 3) == [0, 0, 0, 1, 1]
-    @test digits(24, 2, 7) == [0, 0, 0, 1, 1, 0, 0]
+    @test digits(24, base = 2) == [0, 0, 0, 1, 1]
+    @test digits(24, base = 2, pad = 3) == [0, 0, 0, 1, 1]
+    @test digits(24, base = 2, pad = 7) == [0, 0, 0, 1, 1, 0, 0]
     @test digits(100) == [0, 0, 1]
-    @test digits(BigInt(2)^128, 2) == [zeros(128); 1]
+    @test digits(BigInt(2)^128, base = 2) == [zeros(128); 1]
     let a = zeros(Int, 3)
         digits!(a, 50)
         @test a == [0, 5, 0]
-        digits!(a, 9, 2)
+        digits!(a, 9, base = 2)
         @test a == [1, 0, 0]
-        digits!(a, 7, 2)
+        digits!(a, 7, base = 2)
         @test a == [1, 1, 1]
     end
 end
 # Fill a pre allocated 2x4 matrix
 let a = zeros(Int,(2,4))
     for i in 0:3
-        digits!(view(a,:,i+1),i,2)
+        digits!(view(a,:,i+1),i, base = 2)
     end
     @test a == [0 1 0 1;
                 0 0 1 1]
@@ -2544,7 +2544,7 @@ for x in [1.23, 7, ℯ, 4//5] #[FP, Int, Irrational, Rat]
 end
 
 function allsubtypes!(m::Module, x::DataType, sts::Set)
-    for s in names(m, true)
+    for s in names(m, all = true)
         if isdefined(m, s) && !Base.isdeprecated(m, s)
             t = getfield(m, s)
             if isa(t, Type) && t <: x && t != Union{}
diff --git a/test/parse.jl b/test/parse.jl
index a510e804ac5e4..6114a6c34a1ef 100644
--- a/test/parse.jl
+++ b/test/parse.jl
@@ -1,17 +1,17 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
 # integer parsing
-@test parse(Int32,"0",36) === Int32(0)
-@test parse(Int32,"1",36) === Int32(1)
-@test parse(Int32,"9",36) === Int32(9)
-@test parse(Int32,"A",36) === Int32(10)
-@test parse(Int32,"a",36) === Int32(10)
-@test parse(Int32,"B",36) === Int32(11)
-@test parse(Int32,"b",36) === Int32(11)
-@test parse(Int32,"F",36) === Int32(15)
-@test parse(Int32,"f",36) === Int32(15)
-@test parse(Int32,"Z",36) === Int32(35)
-@test parse(Int32,"z",36) === Int32(35)
+@test parse(Int32,"0", base = 36) === Int32(0)
+@test parse(Int32,"1", base = 36) === Int32(1)
+@test parse(Int32,"9", base = 36) === Int32(9)
+@test parse(Int32,"A", base = 36) === Int32(10)
+@test parse(Int32,"a", base = 36) === Int32(10)
+@test parse(Int32,"B", base = 36) === Int32(11)
+@test parse(Int32,"b", base = 36) === Int32(11)
+@test parse(Int32,"F", base = 36) === Int32(15)
+@test parse(Int32,"f", base = 36) === Int32(15)
+@test parse(Int32,"Z", base = 36) === Int32(35)
+@test parse(Int32,"z", base = 36) === Int32(35)
 
 @test parse(Int,"0") == 0
 @test parse(Int,"-0") == 0
@@ -24,7 +24,7 @@
 @test parse(Int64,"3830974272") == 3830974272
 @test parse(Int64,"-3830974272") == -3830974272
 @test parse(Int,'3') == 3
-@test parse(Int,'3', 8) == 3
+@test parse(Int,'3', base = 8) == 3
 
 # Issue 20587
 for T in vcat(subtypes(Signed), subtypes(Unsigned))
@@ -44,7 +44,7 @@ for T in vcat(subtypes(Signed), subtypes(Unsigned))
         end
 
         # With a base
-        result = @test_throws ArgumentError parse(T, s, 16)
+        result = @test_throws ArgumentError parse(T, s, base = 16)
         exception_with_base = result.value
         if T == Bool
             if s == ""
@@ -107,9 +107,9 @@ end
 @test parse(Bool, "\u202f true") === true
 @test parse(Bool, "\u202f false") === false
 
-parsebin(s) = parse(Int,s,2)
-parseoct(s) = parse(Int,s,8)
-parsehex(s) = parse(Int,s,16)
+parsebin(s) = parse(Int,s, base = 2)
+parseoct(s) = parse(Int,s, base = 8)
+parsehex(s) = parse(Int,s, base = 16)
 
 @test parsebin("0") == 0
 @test parsebin("-0") == 0
@@ -151,12 +151,12 @@ parsehex(s) = parse(Int,s,16)
 @test parsehex("-10") == -16
 @test parsehex("0BADF00D") == 195948557
 @test parsehex("-0BADF00D") == -195948557
-@test parse(Int64,"BADCAB1E",16) == 3135023902
-@test parse(Int64,"-BADCAB1E",16) == -3135023902
-@test parse(Int64,"CafeBabe",16) == 3405691582
-@test parse(Int64,"-CafeBabe",16) == -3405691582
-@test parse(Int64,"DeadBeef",16) == 3735928559
-@test parse(Int64,"-DeadBeef",16) == -3735928559
+@test parse(Int64,"BADCAB1E", base = 16) == 3135023902
+@test parse(Int64,"-BADCAB1E", base = 16) == -3135023902
+@test parse(Int64,"CafeBabe", base = 16) == 3405691582
+@test parse(Int64,"-CafeBabe", base = 16) == -3405691582
+@test parse(Int64,"DeadBeef", base = 16) == 3735928559
+@test parse(Int64,"-DeadBeef", base = 16) == -3735928559
 
 @test parse(Int,"2\n") == 2
 @test parse(Int,"   2 \n ") == 2
@@ -202,7 +202,7 @@ end
 # issue #15597
 # make sure base can be any Integer
 for T in (Int, BigInt)
-    let n = parse(T, "123", Int8(10))
+    let n = parse(T, "123", base = Int8(10))
         @test n == 123
         @test isa(n, T)
     end
@@ -214,12 +214,12 @@ end
 @test parse(Bool, "false") === false
 @test tryparse(Bool, "true") === true
 @test tryparse(Bool, "false") === false
-@test_throws ArgumentError parse(Int, "2", 1)
-@test_throws ArgumentError parse(Int, "2", 63)
+@test_throws ArgumentError parse(Int, "2", base = 1)
+@test_throws ArgumentError parse(Int, "2", base = 63)
 
 # issue #17333: tryparse should still throw on invalid base
 for T in (Int32, BigInt), base in (0,1,100)
-    @test_throws ArgumentError tryparse(T, "0", base)
+    @test_throws ArgumentError tryparse(T, "0", base = base)
 end
 
 # error throwing branch from #10560
diff --git a/test/perf/micro/perf.jl b/test/perf/micro/perf.jl
index 01dc45c5a3a99..1792b6525c292 100644
--- a/test/perf/micro/perf.jl
+++ b/test/perf/micro/perf.jl
@@ -20,7 +20,7 @@ function parseintperf(t)
     for i=1:t
         n = rand(UInt32)
         s = hex(n)
-        m = UInt32(parse(Int64,s,16))
+        m = UInt32(parse(Int64,s, base = 16))
     end
     @test m == n
     return n
diff --git a/test/read.jl b/test/read.jl
index cab02db7c7468..80d8c26edb925 100644
--- a/test/read.jl
+++ b/test/read.jl
@@ -534,15 +534,15 @@ end # mktempdir() do dir
 
 @testset "countlines" begin
     @test countlines(IOBuffer("\n")) == 1
-    @test countlines(IOBuffer("\n"),'\r') == 0
+    @test countlines(IOBuffer("\n"), eol = '\r') == 0
     @test countlines(IOBuffer("\n\n\n\n\n\n\n\n\n\n")) == 10
     @test countlines(IOBuffer("\n \n \n \n \n \n \n \n \n \n")) == 10
     @test countlines(IOBuffer("\r\n \r\n \r\n \r\n \r\n")) == 5
     file = tempname()
     write(file,"Spiffy header\nspectacular first row\neven better 2nd row\nalmost done\n")
     @test countlines(file) == 4
-    @test countlines(file,'\r') == 0
-    @test countlines(file,'\n') == 4
+    @test countlines(file, eol = '\r') == 0
+    @test countlines(file, eol = '\n') == 4
     rm(file)
 end
 
diff --git a/test/reflection.jl b/test/reflection.jl
index a725264a4860a..6c8efecd64d3d 100644
--- a/test/reflection.jl
+++ b/test/reflection.jl
@@ -251,10 +251,10 @@ let
     @test Base.binding_module(TestMod7648, :a9475) == TestMod7648.TestModSub9475
     @test Base.binding_module(TestMod7648.TestModSub9475, :b9475) == TestMod7648.TestModSub9475
     @test Set(names(TestMod7648))==Set([:TestMod7648, :a9475, :foo9475, :c7648, :foo7648, :foo7648_nomethods, :Foo7648])
-    @test Set(names(TestMod7648, true)) == Set([:TestMod7648, :TestModSub9475, :a9475, :foo9475, :c7648, :d7648, :f7648,
+    @test Set(names(TestMod7648, all = true)) == Set([:TestMod7648, :TestModSub9475, :a9475, :foo9475, :c7648, :d7648, :f7648,
                                                 :foo7648, Symbol("#foo7648"), :foo7648_nomethods, Symbol("#foo7648_nomethods"),
                                                 :Foo7648, :eval, Symbol("#eval"), :include, Symbol("#include")])
-    @test Set(names(TestMod7648, true, true)) == Set([:TestMod7648, :TestModSub9475, :a9475, :foo9475, :c7648, :d7648, :f7648,
+    @test Set(names(TestMod7648, all = true, imported = true)) == Set([:TestMod7648, :TestModSub9475, :a9475, :foo9475, :c7648, :d7648, :f7648,
                                                       :foo7648, Symbol("#foo7648"), :foo7648_nomethods, Symbol("#foo7648_nomethods"),
                                                       :Foo7648, :eval, Symbol("#eval"), :include, Symbol("#include"),
                                                       :convert, :curmod_name, :curmod])
@@ -578,7 +578,7 @@ function module_depth(from::Module, to::Module)
     end
 end
 function has_backslashes(mod::Module)
-    for n in names(mod, true, true)
+    for n in names(mod, all = true, imported = true)
         isdefined(mod, n) || continue
         Base.isdeprecated(mod, n) && continue
         f = getfield(mod, n)
diff --git a/test/regex.jl b/test/regex.jl
index 4acd9c9269482..67bfd8616dcb8 100644
--- a/test/regex.jl
+++ b/test/regex.jl
@@ -1,24 +1,24 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-function collect_eachmatch(re, str, overlap=false)
-    [m.match for m in collect(eachmatch(re, str, overlap))]
+function collect_eachmatch(re, str; overlap=false)
+    [m.match for m in collect(eachmatch(re, str, overlap = overlap))]
 end
 
 for f in [matchall, collect_eachmatch]
     @test f(r"a?b?", "asbd") == ["a","","b","",""] == f(r"""a?b?""", "asbd")
-    @test f(r"a?b?", "asbd", true) == ["a","","b","",""]
-    @test f(r"\w+", "hello", true) == ["hello","ello","llo","lo","o"]
+    @test f(r"a?b?", "asbd", overlap=true) == ["a","","b","",""]
+    @test f(r"\w+", "hello", overlap=true) == ["hello","ello","llo","lo","o"]
     @test f(r".\s", "x \u2200 x \u2203 y") == ["x ", "∀ ", "x ", "∃ "]
     @test f(r"(\w+)(\s*)", "The dark side of the moon") ==
           ["The ", "dark ", "side ", "of ", "the ", "moon"]
     @test f(r"", "") == [""]
-    @test f(r"", "", true) == [""]
+    @test f(r"", "", overlap=true) == [""]
     @test f(r"aa", "aaaa") == ["aa", "aa"]
-    @test f(r"aa", "aaaa", true) == ["aa", "aa", "aa"]
+    @test f(r"aa", "aaaa", overlap=true) == ["aa", "aa", "aa"]
     @test f(r"", "aaa") == ["", "", "", ""]
-    @test f(r"", "aaa", true) == ["", "", "", ""]
+    @test f(r"", "aaa", overlap=true) == ["", "", "", ""]
     @test f(r"GCG","GCGCG") == ["GCG"]
-    @test f(r"GCG","GCGCG",true) == ["GCG","GCG"]
+    @test f(r"GCG","GCGCG",overlap=true) == ["GCG","GCG"]
 end
 
 # Issue 8278
diff --git a/test/socket.jl b/test/socket.jl
index 582149b5cf489..e629c88e04d56 100644
--- a/test/socket.jl
+++ b/test/socket.jl
@@ -32,7 +32,7 @@ using Random
     @test_throws ArgumentError parse(IPv4, "192.")
 
     @test ip"::1" == IPv6(1)
-    @test ip"2605:2700:0:3::4713:93e3" == IPv6(parse(UInt128,"260527000000000300000000471393e3",16))
+    @test ip"2605:2700:0:3::4713:93e3" == IPv6(parse(UInt128,"260527000000000300000000471393e3", base = 16))
 
     @test ip"2001:db8:0:0:0:0:2:1" == ip"2001:db8::2:1" == ip"2001:db8::0:2:1"
 
diff --git a/test/strings/basic.jl b/test/strings/basic.jl
index 82b012075f2f1..420ef357b307d 100644
--- a/test/strings/basic.jl
+++ b/test/strings/basic.jl
@@ -64,7 +64,7 @@ end
             b = 2:62,
             _ = 1:10
         n = (T != BigInt) ? rand(T) : BigInt(rand(Int128))
-        @test parse(T, base(b, n), b) == n
+        @test parse(T, base(b, n),  base = b) == n
     end
     end
 end
diff --git a/test/strings/util.jl b/test/strings/util.jl
index 3ac1eb7edbdd1..ef4dc13b31a6c 100644
--- a/test/strings/util.jl
+++ b/test/strings/util.jl
@@ -269,23 +269,23 @@ end
     @test chop("fooε") == "foo"
     @test chop("foεo") == "foε"
     @test chop("∃∃∃∃") == "∃∃∃"
-    @test chop("∀ϵ∃Δ", 0, 0) == "∀ϵ∃Δ"
-    @test chop("∀ϵ∃Δ", 0, 1) == "∀ϵ∃"
-    @test chop("∀ϵ∃Δ", 0, 2) == "∀ϵ"
-    @test chop("∀ϵ∃Δ", 0, 3) == "∀"
-    @test chop("∀ϵ∃Δ", 0, 4) == ""
-    @test chop("∀ϵ∃Δ", 0, 5) == ""
-    @test chop("∀ϵ∃Δ", 1, 0) == "ϵ∃Δ"
-    @test chop("∀ϵ∃Δ", 2, 0) == "∃Δ"
-    @test chop("∀ϵ∃Δ", 3, 0) == "Δ"
-    @test chop("∀ϵ∃Δ", 4, 0) == ""
-    @test chop("∀ϵ∃Δ", 5, 0) == ""
-    @test chop("∀ϵ∃Δ", 1, 1) == "ϵ∃"
-    @test chop("∀ϵ∃Δ", 2, 2) == ""
-    @test chop("∀ϵ∃Δ", 3, 3) == ""
-    @test_throws ArgumentError chop("∀ϵ∃Δ", -3, 3)
-    @test_throws ArgumentError chop("∀ϵ∃Δ", 3, -3)
-    @test_throws ArgumentError chop("∀ϵ∃Δ", -3, -3)
+    @test chop("∀ϵ∃Δ", head=0, tail=0) == "∀ϵ∃Δ"
+    @test chop("∀ϵ∃Δ", head=0, tail=1) == "∀ϵ∃"
+    @test chop("∀ϵ∃Δ", head=0, tail=2) == "∀ϵ"
+    @test chop("∀ϵ∃Δ", head=0, tail=3) == "∀"
+    @test chop("∀ϵ∃Δ", head=0, tail=4) == ""
+    @test chop("∀ϵ∃Δ", head=0, tail=5) == ""
+    @test chop("∀ϵ∃Δ", head=1, tail=0) == "ϵ∃Δ"
+    @test chop("∀ϵ∃Δ", head=2, tail=0) == "∃Δ"
+    @test chop("∀ϵ∃Δ", head=3, tail=0) == "Δ"
+    @test chop("∀ϵ∃Δ", head=4, tail=0) == ""
+    @test chop("∀ϵ∃Δ", head=5, tail=0) == ""
+    @test chop("∀ϵ∃Δ", head=1, tail=1) == "ϵ∃"
+    @test chop("∀ϵ∃Δ", head=2, tail=2) == ""
+    @test chop("∀ϵ∃Δ", head=3, tail=3) == ""
+    @test_throws ArgumentError chop("∀ϵ∃Δ", head=-3, tail=3)
+    @test_throws ArgumentError chop("∀ϵ∃Δ", head=3, tail=-3)
+    @test_throws ArgumentError chop("∀ϵ∃Δ", head=-3, tail=-3)
 
     @test isa(chomp("foo"), SubString)
     @test isa(chop("foo"), SubString)