diff --git a/tests/integration/ci.rs b/tests/integration/ci.rs
index d5966ff..d039110 100644
--- a/tests/integration/ci.rs
+++ b/tests/integration/ci.rs
@@ -6,6 +6,9 @@ use std::{fs::read_to_string, path::Path};
 #[test]
 fn clippy() {
     Command::new("cargo")
+        // smoelius: Remove `CARGO` environment variable to work around:
+        // https://github.com/rust-lang/rust/pull/131729
+        .env_remove("CARGO")
         .args([
             "+nightly",
             "clippy",