diff --git a/clippy.toml b/clippy.toml
index 4f9be8f9b08..050cc871638 100644
--- a/clippy.toml
+++ b/clippy.toml
@@ -1,3 +1,5 @@
+allow-print-in-tests = true
+allow-dbg-in-tests = true
 disallowed-methods = [
     { path = "std::env::var", reason = "Use `Config::get_env` instead. See rust-lang/cargo#11588" },
     { path = "std::env::var_os", reason = "Use `Config::get_env_os` instead. See rust-lang/cargo#11588" },
diff --git a/src/cargo/lib.rs b/src/cargo/lib.rs
index 31d03ad259c..a03d5119978 100644
--- a/src/cargo/lib.rs
+++ b/src/cargo/lib.rs
@@ -6,6 +6,9 @@
 #![allow(clippy::all)]
 #![warn(clippy::disallowed_methods)]
 #![warn(clippy::self_named_module_files)]
+#![warn(clippy::print_stdout)]
+#![warn(clippy::print_stderr)]
+#![warn(clippy::dbg_macro)]
 #![allow(rustdoc::private_intra_doc_links)]
 
 //! # Cargo as a library
diff --git a/tests/internal.rs b/tests/internal.rs
deleted file mode 100644
index c42cfa8f07b..00000000000
--- a/tests/internal.rs
+++ /dev/null
@@ -1,107 +0,0 @@
-//! Tests for internal code checks.
-
-#![allow(clippy::all)]
-
-use std::fs;
-
-#[test]
-fn check_forbidden_code() {
-    // Do not use certain macros, functions, etc.
-    if !cargo_util::is_ci() {
-        // Only check these on CI, otherwise it could be annoying.
-        use std::io::Write;
-        writeln!(
-            std::io::stderr(),
-            "\nSkipping check_forbidden_code test, set CI=1 to enable"
-        )
-        .unwrap();
-        return;
-    }
-    let root_path = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("src");
-    for entry in walkdir::WalkDir::new(&root_path)
-        .into_iter()
-        .filter_entry(|e| e.path() != root_path.join("doc"))
-        .filter_map(|e| e.ok())
-    {
-        let path = entry.path();
-        if !entry
-            .file_name()
-            .to_str()
-            .map(|s| s.ends_with(".rs"))
-            .unwrap_or(false)
-        {
-            continue;
-        }
-        eprintln!("checking {}", path.display());
-        let c = fs::read_to_string(path).unwrap();
-        for (line_index, line) in c.lines().enumerate() {
-            if line.trim().starts_with("//") {
-                continue;
-            }
-            if line_has_print(line) {
-                if entry.file_name().to_str().unwrap() == "cargo_new.rs" && line.contains("Hello") {
-                    // An exception.
-                    continue;
-                }
-                panic!(
-                    "found print macro in {}:{}\n\n{}\n\n\
-                    print! macros should not be used in Cargo because they can panic.\n\
-                    Use one of the drop_print macros instead.\n\
-                    ",
-                    path.display(),
-                    line_index,
-                    line
-                );
-            }
-            if line_has_macro(line, "dbg") {
-                panic!(
-                    "found dbg! macro in {}:{}\n\n{}\n\n\
-                    dbg! should not be used outside of debugging.",
-                    path.display(),
-                    line_index,
-                    line
-                );
-            }
-        }
-    }
-}
-
-fn line_has_print(line: &str) -> bool {
-    line_has_macro(line, "print")
-        || line_has_macro(line, "eprint")
-        || line_has_macro(line, "println")
-        || line_has_macro(line, "eprintln")
-}
-
-#[test]
-fn line_has_print_works() {
-    assert!(line_has_print("print!"));
-    assert!(line_has_print("println!"));
-    assert!(line_has_print("eprint!"));
-    assert!(line_has_print("eprintln!"));
-    assert!(line_has_print("(print!(\"hi!\"))"));
-    assert!(!line_has_print("print"));
-    assert!(!line_has_print("i like to print things"));
-    assert!(!line_has_print("drop_print!"));
-    assert!(!line_has_print("drop_println!"));
-    assert!(!line_has_print("drop_eprint!"));
-    assert!(!line_has_print("drop_eprintln!"));
-}
-
-fn line_has_macro(line: &str, mac: &str) -> bool {
-    for (i, _) in line.match_indices(mac) {
-        if line.get(i + mac.len()..i + mac.len() + 1) != Some("!") {
-            continue;
-        }
-        if i == 0 {
-            return true;
-        }
-        // Check for identifier boundary start.
-        let prev1 = line.get(i - 1..i).unwrap().chars().next().unwrap();
-        if prev1.is_alphanumeric() || prev1 == '_' {
-            continue;
-        }
-        return true;
-    }
-    false
-}