diff --git a/tools/l2cap-tester.c b/tools/l2cap-tester.c
index 802c0e4..df8f1bf 100644
--- a/tools/l2cap-tester.c
+++ b/tools/l2cap-tester.c
@@ -198,6 +198,11 @@ static void test_post_teardown(const void *test_data)
 {
 	struct test_data *data = tester_get_data();
 
+	if (data->io_id > 0) {
+		g_source_remove(data->io_id);
+		data->io_id = 0;
+	}
+
 	hciemu_unref(data->hciemu);
 	data->hciemu = NULL;
 }
@@ -206,9 +211,6 @@ static void test_data_free(void *test_data)
 {
 	struct test_data *data = test_data;
 
-	if (data->io_id > 0)
-		g_source_remove(data->io_id);
-
 	free(data);
 }