diff --git a/test/scripts/install-sh.test.ts b/test/scripts/install-sh.test.ts
index 2cac0e5237a2..394ddf111afe 100644
--- a/test/scripts/install-sh.test.ts
+++ b/test/scripts/install-sh.test.ts
@@ -987,6 +987,9 @@ describe("install.sh", () => {
           `cd ${JSON.stringify(process.cwd())}`,
           `source ${JSON.stringify(SCRIPT_PATH)}`,
           "set +e",
+          "unset -f node 2>/dev/null || true",
+          "unalias node 2>/dev/null || true",
+          "hash -r",
           `FAKE_NODE_VERSION="v22.${minMinor - 1}.0"`,
           "export FAKE_NODE_VERSION",
           "node_is_at_least_required",