diff --git a/src/os/os_test.go b/src/os/os_test.go
index 277b2455e66dea..f8c4af066e7c1b 100644
--- a/src/os/os_test.go
+++ b/src/os/os_test.go
@@ -2548,6 +2548,24 @@ func TestDoubleCloseError(t *testing.T) {
 	testDoubleCloseError(t, sfdir)
 }
 
+func TestUserCacheDir(t *testing.T) {
+	cacheDir, err := UserCacheDir()
+	if err != nil {
+		t.Skipf("skipping: %v", err)
+	}
+	if cacheDir == "" {
+		t.Fatalf("UserCacheDir returned %q; want non-empty path or error", cacheDir)
+	}
+
+	d, err := os.MkdirTemp(cacheDir, "TestUserCacheDir")
+	if err != nil {
+		t.Fatalf("could not write to UserCacheDir %q: %v", cacheDir, err)
+	}
+	if err := os.Remove(d); err != nil {
+		t.Error(err)
+	}
+}
+
 func TestUserHomeDir(t *testing.T) {
 	dir, err := UserHomeDir()
 	if dir == "" && err == nil {