diff --git a/cc/test.go b/cc/test.go
index 95d0bfa..aff8ba5 100644
--- a/cc/test.go
+++ b/cc/test.go
@@ -151,7 +151,7 @@
 
 var _ testPerSrc = (*testBinary)(nil)
 
-func testPerSrcMutator(mctx android.BottomUpMutatorContext) {
+func TestPerSrcMutator(mctx android.BottomUpMutatorContext) {
 	if m, ok := mctx.Module().(*Module); ok {
 		if test, ok := m.linker.(testPerSrc); ok {
 			numTests := len(test.srcs())