diff --git a/doc/api/cli.md b/doc/api/cli.md
index 2a3debd1b9661e..3dd9951b4a13a5 100644
--- a/doc/api/cli.md
+++ b/doc/api/cli.md
@@ -539,6 +539,10 @@ added: v0.1.32
 
 `','`-separated list of core modules that should print debug information.
 
+### `NODE_DEBUG_NATIVE=module[,…]`
+
+`','`-separated list of core C++ modules that should print debug information.
+
 ### `NODE_DISABLE_COLORS=1`
 <!-- YAML
 added: v0.3.0
diff --git a/doc/node.1 b/doc/node.1
index d3c66d08cf3448..96fcd3a9f4d506 100644
--- a/doc/node.1
+++ b/doc/node.1
@@ -283,6 +283,9 @@ Print node's version.
 .It Ev NODE_DEBUG Ar modules...
 Comma-separated list of core modules that should print debug information.
 .
+.It Ev NODE_DEBUG_NATIVE Ar modules...
+Comma-separated list of C++ core modules that should print debug information.
+.
 .It Ev NODE_DISABLE_COLORS
 When set to
 .Ar 1 ,
@@ -331,6 +334,11 @@ When set to
 .Ar 1 ,
 emit pending deprecation warnings.
 .
+.It Ev NODE_PRESERVE_SYMLINKS
+When set to
+.Ar 1 ,
+the module loader preserves symbolic links when resolving and caching modules.
+.
 .It Ev NODE_REDIRECT_WARNINGS Ar file
 Write process warnings to the given
 .Ar file
@@ -347,6 +355,15 @@ The default path is
 which is overridden by this variable.
 Setting the value to an empty string ("" or " ") will disable persistent REPL history.
 .
+.It Ev NODE_TLS_REJECT_UNAUTHORIZED
+When set to
+.Ar 0 ,
+TLS certificate validation is disabled.
+.
+.It Ev NODE_V8_COVERAGE Ar dir
+When set, Node.js writes JavaScript code coverage information to
+.Ar dir .
+.
 .It Ev OPENSSL_CONF Ar file
 Load an OpenSSL configuration file on startup.
 Among other uses, this can be used to enable FIPS-compliant crypto if Node.js is built with
@@ -365,8 +382,12 @@ is enabled, this overrides and sets OpenSSL's directory containing trusted certi
 If
 .Fl -use-openssl-ca
 is enabled, this overrides and sets OpenSSL's file containing trusted certificates.
-.El
 .
+.It Ev UV_THREADPOOL_SIZE Ar size
+Sets the number of threads used in libuv's threadpool to
+.Ar size .
+.
+.El
 .\"=====================================================================
 .Sh BUGS
 Bugs are tracked in GitHub Issues:
diff --git a/lib/internal/print_help.js b/lib/internal/print_help.js
index d9ab3c1ad84e90..9081a09e4fb027 100644
--- a/lib/internal/print_help.js
+++ b/lib/internal/print_help.js
@@ -29,9 +29,17 @@ const envVars = new Map([
     'of stderr' }],
   ['NODE_REPL_HISTORY', { helpText: 'path to the persistent REPL ' +
     'history file' }],
+  ['NODE_TLS_REJECT_UNAUTHORIZED', { helpText: 'set to 0 to disable TLS ' +
+    'certificate validation' }],
   ['NODE_V8_COVERAGE', { helpText: 'directory to output v8 coverage JSON ' +
     'to' }],
-  ['OPENSSL_CONF', { helpText: 'load OpenSSL configuration from file' }]
+  ['OPENSSL_CONF', { helpText: 'load OpenSSL configuration from file' }],
+  ['SSL_CERT_DIR', { helpText: 'sets OpenSSL\'s directory of trusted ' +
+    'certificates when used in conjunction with --use-openssl-ca' }],
+  ['SSL_CERT_FILE', { helpText: 'sets OpenSSL\'s trusted certificate file ' +
+    'when used in conjunction with --use-openssl-ca' }],
+  ['UV_THREADPOOL_SIZE', { helpText: 'sets the number of threads used in ' +
+    'libuv\'s threadpool' }]
 ].concat(hasIntl ? [
   ['NODE_ICU_DATA', { helpText: 'data path for ICU (Intl object) data' +
     hasSmallICU ? '' : ' (will extend linked-in data)' }]