diff --git a/cc/lto_test.go b/cc/lto_test.go
index afd2c77..fbd91be 100644
--- a/cc/lto_test.go
+++ b/cc/lto_test.go
@@ -23,6 +23,7 @@
 )
 
 func TestThinLtoDeps(t *testing.T) {
+	t.Parallel()
 	bp := `
 	cc_library_shared {
 		name: "lto_enabled",
@@ -106,6 +107,7 @@
 }
 
 func TestThinLtoOnlyOnStaticDep(t *testing.T) {
+	t.Parallel()
 	bp := `
 	cc_library_shared {
 		name: "root",