TBR: fix go-generate build.

Change-Id: Ice0802a821942367ade3d792987ffd23b01558fd
diff --git a/tools/vrun/test/v23_test.go b/tools/vrun/test/v23_test.go
index aab129c..ebbc180 100644
--- a/tools/vrun/test/v23_test.go
+++ b/tools/vrun/test/v23_test.go
@@ -10,8 +10,11 @@
 
 func TestMain(m *testing.M) {
 	testutil.Init()
+	cleanup := v23tests.UseSharedBinDir()
+	r := m.Run()
+	cleanup()
 	// TODO(cnicolaou): call modules.Dispatch and remove the need for TestHelperProcess
-	os.Exit(m.Run())
+	os.Exit(r)
 }
 
 func TestV23Agentd(t *testing.T) {