diff --git a/benches/capture/Cargo.toml b/benches/capture/Cargo.toml
index b7531c26f..6319a0130 100644
--- a/benches/capture/Cargo.toml
+++ b/benches/capture/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "Tool for capturing a real-world workspace for benchmarking."
+publish = false
 
 [dependencies]
 cargo_metadata.workspace = true
diff --git a/crates/cargo-test-macro/Cargo.toml b/crates/cargo-test-macro/Cargo.toml
index 04dafc028..e40602ae3 100644
--- a/crates/cargo-test-macro/Cargo.toml
+++ b/crates/cargo-test-macro/Cargo.toml
@@ -7,6 +7,7 @@ homepage = "https://github.com/rust-lang/cargo"
 repository = "https://github.com/rust-lang/cargo"
 documentation = "https://github.com/rust-lang/cargo"
 description = "Helper proc-macro for Cargo's testsuite."
+publish = false
 
 [lib]
 proc-macro = true
diff --git a/crates/cargo-test-support/Cargo.toml b/crates/cargo-test-support/Cargo.toml
index 92ee1dcc4..305c809a8 100644
--- a/crates/cargo-test-support/Cargo.toml
+++ b/crates/cargo-test-support/Cargo.toml
@@ -3,6 +3,7 @@ name = "cargo-test-support"
 version = "0.1.0"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+publish = false
 
 [lib]
 doctest = false