diff --git a/pyo3-ffi-check/Cargo.toml b/pyo3-ffi-check/Cargo.toml
index 9321c1a5..e5594f5f 100644
--- a/pyo3-ffi-check/Cargo.toml
+++ b/pyo3-ffi-check/Cargo.toml
@@ -2,6 +2,7 @@
 name = "pyo3-ffi-check"
 version = "0.1.0"
 edition = "2021"
+publish = false
 
 [dependencies]
 pyo3-ffi-check-macro = { path = "./macro" }
diff --git a/pytests/Cargo.toml b/pytests/Cargo.toml
index 6b356342..e697ac16 100644
--- a/pytests/Cargo.toml
+++ b/pytests/Cargo.toml
@@ -4,6 +4,7 @@ name = "pyo3-pytests"
 version = "0.1.0"
 description = "Python-based tests for PyO3"
 edition = "2018"
+publish = false
 
 [dependencies]
 pyo3 = { path = "../", features = ["extension-module"] }