diff --git a/tests/go/fixtures/vendored/vendor/modules.txt b/tests/go/fixtures/vendored/vendor/modules.txt
index a6a6834..61481cf 100644
--- a/tests/go/fixtures/vendored/vendor/modules.txt
+++ b/tests/go/fixtures/vendored/vendor/modules.txt
@@ -1,2 +1,3 @@
 # golang.org/x/net v0.0.0-20191105084925-a882066a44e0
+## explicit; go 1.11
 golang.org/x/net/netutil