diff --git a/protoc-gen-rails/main_test.go b/protoc-gen-rails/main_test.go
index 609833f..e3ad94a 100644
--- a/protoc-gen-rails/main_test.go
+++ b/protoc-gen-rails/main_test.go
@@ -33,7 +33,9 @@ func fileNames(directory string, appendDirectory bool, extension string) ([]stri
             return nil
         }
         files = append(files, info)
-        fullPaths = append(fullPaths, path)
+        if info.Name() != ".keep" {
+            fullPaths = append(fullPaths, path)
+        }
         if err != nil {
             fmt.Println("ERROR:", err)
         }
@@ -89,6 +91,25 @@ func Test_Base(t *testing.T) {
     runTest(t, "base", map[string]string{})
 }
 
+func Test_NoServices(t *testing.T) {
+    workdir, _ := os.Getwd()
+    tmpdir, err := os.MkdirTemp(workdir, "proto-test.")
+    if err != nil {
+        t.Fatal(err)
+    }
+    defer os.RemoveAll(tmpdir)
+
+    args := []string{
+        "-I.",
+        "--rails_out=" + tmpdir,
+    }
+    args = append(args, fmt.Sprintf("testdata/test.proto"))
+    protoc(t, args)
+
+    testDir := workdir + "/testdata/no_service"
+    assertEqualFiles(t, testDir, tmpdir)
+}
+
 func assertEqualFiles(t *testing.T, original, generated string) {
     names, err := fileNames(original, false, "")
     if err != nil {
diff --git a/protoc-gen-rails/testdata/base/config/routes/grpc.rb b/protoc-gen-rails/testdata/base/config/routes/grpc.rb
index ec1d152..d50272e 100644
--- a/protoc-gen-rails/testdata/base/config/routes/grpc.rb
+++ b/protoc-gen-rails/testdata/base/config/routes/grpc.rb
@@ -1,6 +1,7 @@
+# frozen_string_literal: true
 
 ####### THIS FILE IS AUTOMATICALLY GENERATED BY protoc-gen-rails. DO NOT MODIFY. #######
 
-get "/test/:blah/:repeated_string" => "my_service#test"
-post "/test2" => "my_service#test_2"
-post "/test3/:sub_id" => "my_service#test_3"
+get '/test/:blah/:repeated_string' => 'my_service#test'
+post '/test2' => 'my_service#test_2'
+post '/test3/:sub_id' => 'my_service#test_3'
diff --git a/protoc-gen-rails/testdata/no_service/.keep b/protoc-gen-rails/testdata/no_service/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/protoc-gen-rails/testdata/test.proto b/protoc-gen-rails/testdata/test.proto
new file mode 100644
index 0000000..331c23e
--- /dev/null
+++ b/protoc-gen-rails/testdata/test.proto
@@ -0,0 +1,6 @@
+syntax = "proto3";
+package test;
+
+message Test {
+  string test = 1;
+}