diff --git a/src/cmd/go/testdata/script/build_buildvcs_auto.txt b/src/cmd/go/testdata/script/build_buildvcs_auto.txt
index 9eac568045..dd9eef5f82 100644
--- a/src/cmd/go/testdata/script/build_buildvcs_auto.txt
+++ b/src/cmd/go/testdata/script/build_buildvcs_auto.txt
@@ -6,11 +6,15 @@
 
 cd sub
 exec git init .
+exec git config user.name 'Nameless Gopher'
+exec git config user.email 'nobody@golang.org'
 exec git add sub.go
 exec git commit -m 'initial state'
 cd ..
 
 exec git init
+exec git config user.name 'Nameless Gopher'
+exec git config user.email 'nobody@golang.org'
 exec git submodule add ./sub
 exec git add go.mod example.go
 exec git commit -m 'initial state'