diff --git a/google/data_source_google_compute_region_instance_group_test.go b/google/data_source_google_compute_region_instance_group_test.go
index cc755831..c2ddb7f9 100644
--- a/google/data_source_google_compute_region_instance_group_test.go
+++ b/google/data_source_google_compute_region_instance_group_test.go
@@ -20,7 +20,7 @@ func TestAccDataSourceRegionInstanceGroup(t *testing.T) {
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "name", name),
 					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "project", getTestProjectFromEnv()),
-					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "instances.#", "10")),
+					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "instances.#", "1")),
 			},
 		},
 	})