diff --git a/cc/proto_test.go b/cc/proto_test.go
new file mode 100644
index 0000000..6fee924
--- /dev/null
+++ b/cc/proto_test.go
@@ -0,0 +1,36 @@
+// Copyright 2016 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cc
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestProto(t *testing.T) {
+	t.Run("simple", func(t *testing.T) {
+		ctx := testCc(t, `
+		cc_library_shared {
+			name: "libfoo",
+			srcs: ["a.proto"],
+		}`)
+
+		proto := ctx.ModuleForTests("libfoo", "android_arm_armv7-a-neon_core_shared").Output("proto/a.pb.cc")
+
+		if cmd := proto.RuleParams.Command; !strings.Contains(cmd, "--cpp_out=") {
+			t.Errorf("expected '--cpp_out' in %q", cmd)
+		}
+	})
+}