diff --git a/src/ruby/bin/interop/test/cpp/interop/test_services.rb b/src/ruby/bin/interop/test/cpp/interop/test_services.rb
index 464d5e24f65020a20931294c8e7efea8c708bc02..17b5461d3e3c20a0a02f2eeb35eff9e984f7a36f 100644
--- a/src/ruby/bin/interop/test/cpp/interop/test_services.rb
+++ b/src/ruby/bin/interop/test/cpp/interop/test_services.rb
@@ -44,6 +44,7 @@ module Grpc
 
         self.marshal_class_method = :encode
         self.unmarshal_class_method = :decode
+        self.service_name = 'grpc.testing.TestService'
 
         rpc :EmptyCall, Empty, Empty
         rpc :UnaryCall, SimpleRequest, SimpleResponse
diff --git a/src/ruby/bin/math_services.rb b/src/ruby/bin/math_services.rb
index 7e056025cfa29d2ff73c03bea675d0e784b25d3e..f6ca6fe060c942b63b7a60582a6bc7f3d75d48fc 100644
--- a/src/ruby/bin/math_services.rb
+++ b/src/ruby/bin/math_services.rb
@@ -43,6 +43,7 @@ module Math
 
       self.marshal_class_method = :encode
       self.unmarshal_class_method = :decode
+      self.service_name = 'math.Math'
 
       rpc :Div, DivArgs, DivReply
       rpc :DivMany, stream(DivArgs), stream(DivReply)