diff --git a/src/checkoutservice/main.go b/src/checkoutservice/main.go
index af0e36e..8ba4b8b 100644
--- a/src/checkoutservice/main.go
+++ b/src/checkoutservice/main.go
@@ -193,7 +193,7 @@ func (cs *checkoutService) Check(ctx context.Context, req *healthpb.HealthCheckR
 }
 
 func (cs *checkoutService) Watch(req *healthpb.HealthCheckRequest, ws healthpb.Health_WatchServer) error {
-	return nil
+	return status.Errorf(codes.Unimplemented, "health check via Watch not implemented")
 }
 
 func (cs *checkoutService) PlaceOrder(ctx context.Context, req *pb.PlaceOrderRequest) (*pb.PlaceOrderResponse, error) {
diff --git a/src/productcatalogservice/productcatalogservice b/src/productcatalogservice/productcatalogservice
deleted file mode 100755
index 68ffc5a..0000000
Binary files a/src/productcatalogservice/productcatalogservice and /dev/null differ
diff --git a/src/productcatalogservice/server.go b/src/productcatalogservice/server.go
index 577fd15..ab39d70 100644
--- a/src/productcatalogservice/server.go
+++ b/src/productcatalogservice/server.go
@@ -241,7 +241,7 @@ func (p *productCatalog) Check(ctx context.Context, req *healthpb.HealthCheckReq
 }
 
 func (p *productCatalog) Watch(req *healthpb.HealthCheckRequest, ws healthpb.Health_WatchServer) error {
-	return nil
+	return status.Errorf(codes.Unimplemented, "health check via Watch not implemented")
 }
 
 func (p *productCatalog) ListProducts(context.Context, *pb.Empty) (*pb.ListProductsResponse, error) {
diff --git a/src/shippingservice/main.go b/src/shippingservice/main.go
index 46f2881..5523a71 100644
--- a/src/shippingservice/main.go
+++ b/src/shippingservice/main.go
@@ -91,7 +91,7 @@ func (s *server) Check(ctx context.Context, req *healthpb.HealthCheckRequest) (*
 }
 
 func (s *server) Watch(req *healthpb.HealthCheckRequest, ws healthpb.Health_WatchServer) error {
-	return nil
+	return status.Errorf(codes.Unimplemented, "health check via Watch not implemented")
 }
 
 // GetQuote produces a shipping quote (cost) in USD.