diff --git a/mmv1/third_party/terraform/acctest/bootstrap_test_utils.go.tmpl b/mmv1/third_party/terraform/acctest/bootstrap_test_utils.go.tmpl
index 8462c33c6f41..7071bf4aed10 100644
--- a/mmv1/third_party/terraform/acctest/bootstrap_test_utils.go.tmpl
+++ b/mmv1/third_party/terraform/acctest/bootstrap_test_utils.go.tmpl
@@ -738,10 +738,11 @@ func BootstrapConfig(t *testing.T) *transport_tpg.Config {
 	}
 
 	config := &transport_tpg.Config{
-		Credentials: envvar.GetTestCredsFromEnv(),
-		Project:     envvar.GetTestProjectFromEnv(),
-		Region:      envvar.GetTestRegionFromEnv(),
-		Zone:        envvar.GetTestZoneFromEnv(),
+		Credentials:               envvar.GetTestCredsFromEnv(),
+		ImpersonateServiceAccount: envvar.GetTestImpersonateServiceAccountFromEnv(),
+		Project:                   envvar.GetTestProjectFromEnv(),
+		Region:                    envvar.GetTestRegionFromEnv(),
+		Zone:                      envvar.GetTestZoneFromEnv(),
 	}
 
 	transport_tpg.ConfigureBasePaths(config)
diff --git a/mmv1/third_party/terraform/envvar/envvar_utils.go b/mmv1/third_party/terraform/envvar/envvar_utils.go
index 90a866e4d941..1dc4eb6e2b33 100644
--- a/mmv1/third_party/terraform/envvar/envvar_utils.go
+++ b/mmv1/third_party/terraform/envvar/envvar_utils.go
@@ -104,6 +104,10 @@ var PapDescriptionEnvVars = []string{
 	"GOOGLE_PUBLIC_AVERTISED_PREFIX_DESCRIPTION",
 }
 
+var ImpersonateServiceAccountEnvVars = []string{
+	"GOOGLE_IMPERSONATE_SERVICE_ACCOUNT",
+}
+
 // AccTestPreCheck ensures at least one of the project env variables is set.
 func GetTestProjectNumberFromEnv() string {
 	return transport_tpg.MultiEnvSearch(ProjectNumberEnvVars)
@@ -138,6 +142,10 @@ func GetTestZoneFromEnv() string {
 	return transport_tpg.MultiEnvSearch(ZoneEnvVars)
 }
 
+func GetTestImpersonateServiceAccountFromEnv() string {
+	return transport_tpg.MultiEnvSearch(ImpersonateServiceAccountEnvVars)
+}
+
 func GetTestCustIdFromEnv(t *testing.T) string {
 	SkipIfEnvNotSet(t, CustIdEnvVars...)
 	return transport_tpg.MultiEnvSearch(CustIdEnvVars)