diff --git a/src/cmd/go/testflag.go b/src/cmd/go/testflag.go
index ee4ab187e0..1f3e3d316a 100644
--- a/src/cmd/go/testflag.go
+++ b/src/cmd/go/testflag.go
@@ -36,6 +36,7 @@ var testFlagDefn = []*testFlagSpec{
 	{name: "cover", boolVar: &testCover},
 	{name: "covermode"},
 	{name: "coverpkg"},
+	{name: "exec"},
 
 	// passed to 6.out, adding a "test." prefix to the name if necessary: -v becomes -test.v.
 	{name: "bench", passToTest: true},