diff --git a/ginkgo/run_watch_and_build_command_flags.go b/ginkgo/run_watch_and_build_command_flags.go
index b7cb7f566..216443461 100644
--- a/ginkgo/run_watch_and_build_command_flags.go
+++ b/ginkgo/run_watch_and_build_command_flags.go
@@ -126,6 +126,7 @@ func (c *RunWatchAndBuildCommandFlags) flags(mode int) {
 	c.FlagSet.BoolVar(c.boolSlot("work"), "work", false, "Print the name of the temporary work directory and do not delete it when exiting.")
 	c.FlagSet.StringVar(c.stringSlot("asmflags"), "asmflags", "", "Arguments to pass on each go tool asm invocation.")
 	c.FlagSet.StringVar(c.stringSlot("buildmode"), "buildmode", "", "Build mode to use. See 'go help buildmode' for more.")
+	c.FlagSet.StringVar(c.stringSlot("mod"), "mod", "", "Go module control. See 'go help modules' for more.")
 	c.FlagSet.StringVar(c.stringSlot("compiler"), "compiler", "", "Name of compiler to use, as in runtime.Compiler (gccgo or gc).")
 	c.FlagSet.StringVar(c.stringSlot("gccgoflags"), "gccgoflags", "", "Arguments to pass on each gccgo compiler/linker invocation.")
 	c.FlagSet.StringVar(c.stringSlot("installsuffix"), "installsuffix", "", "A suffix to use in the name of the package installation directory.")
diff --git a/ginkgo/testrunner/test_runner.go b/ginkgo/testrunner/test_runner.go
index a0113e136..af1355bed 100644
--- a/ginkgo/testrunner/test_runner.go
+++ b/ginkgo/testrunner/test_runner.go
@@ -119,6 +119,7 @@ func (t *TestRunner) BuildArgs(path string) []string {
 		"coverpkg",
 		"tags",
 		"gcflags",
+		"mod",
 	}
 
 	for _, opt := range stringOpts {
diff --git a/ginkgo/testrunner/test_runner_test.go b/ginkgo/testrunner/test_runner_test.go
index 691917043..7437d5cf2 100644
--- a/ginkgo/testrunner/test_runner_test.go
+++ b/ginkgo/testrunner/test_runner_test.go
@@ -32,6 +32,7 @@ var _ = Describe("TestRunner", func() {
 			"coverpkg":         strAddr(""),
 			"cover":            boolAddr(false),
 			"blockprofilerate": intAddr(100),
+			"mod":              strAddr("vendor"),
 		}
 		tr := testrunner.New(testsuite.TestSuite{}, 1, false, 0, opts, []string{})
 
@@ -50,6 +51,7 @@ var _ = Describe("TestRunner", func() {
 			"-asmflags=a",
 			"-pkgdir=b",
 			"-gcflags=c",
+			"-mod=vendor",
 		}))
 	})
 })