diff --git a/grpc/controlproxy/controlproxy_test.go b/grpc/controlproxy/controlproxy_medium_test.go
similarity index 99%
rename from grpc/controlproxy/controlproxy_test.go
rename to grpc/controlproxy/controlproxy_medium_test.go
index dab382839..76f17e9a9 100644
--- a/grpc/controlproxy/controlproxy_test.go
+++ b/grpc/controlproxy/controlproxy_medium_test.go
@@ -1,3 +1,5 @@
+// +build medium
+
 /*
 http://www.apache.org/licenses/LICENSE-2.0.txt
 
diff --git a/pkg/netutil/net_test.go b/pkg/netutil/net_medium_test.go
similarity index 98%
rename from pkg/netutil/net_test.go
rename to pkg/netutil/net_medium_test.go
index 014193cf3..897560ca7 100644
--- a/pkg/netutil/net_test.go
+++ b/pkg/netutil/net_medium_test.go
@@ -1,3 +1,5 @@
+// +build medium
+
 /*
 http://www.apache.org/licenses/LICENSE-2.0.txt
 
diff --git a/pkg/rpcutil/rpc_test.go b/pkg/rpcutil/rpc_medium_test.go
similarity index 98%
rename from pkg/rpcutil/rpc_test.go
rename to pkg/rpcutil/rpc_medium_test.go
index 9f244fd07..b536cdab9 100644
--- a/pkg/rpcutil/rpc_test.go
+++ b/pkg/rpcutil/rpc_medium_test.go
@@ -1,3 +1,5 @@
+// +build medium
+
 /*
 http://www.apache.org/licenses/LICENSE-2.0.txt