diff --git a/modules/terraform/format_test.go b/modules/terraform/format_test.go
index e82ad8e07..8337d8b78 100644
--- a/modules/terraform/format_test.go
+++ b/modules/terraform/format_test.go
@@ -292,6 +292,7 @@ func TestFormatSetVarsAfterVarFilesFormatsCorrectly(t *testing.T) {
 		{[]string{"plan"}, map[string]interface{}{"foo": "bar"}, []string{"test.tfvars"}, true, []string{"plan", "-var-file", "test.tfvars", "-var", "foo=bar", "-lock=false"}},
 		{[]string{"plan"}, map[string]interface{}{"foo": "bar", "hello": "world"}, []string{"test.tfvars"}, true, []string{"plan", "-var-file", "test.tfvars", "-var", "foo=bar", "-var", "hello=world", "-lock=false"}},
 		{[]string{"plan"}, map[string]interface{}{"foo": "bar", "hello": "world"}, []string{"test.tfvars"}, false, []string{"plan", "-var", "foo=bar", "-var", "hello=world", "-var-file", "test.tfvars", "-lock=false"}},
+		{[]string{"plan"}, map[string]interface{}{"foo": "bar"}, []string{"test.tfvars"}, false, []string{"plan", "-var", "foo=bar", "-var-file", "test.tfvars", "-lock=false"}},
 	}
 
 	for _, testCase := range testCases {