diff --git a/libnm-util/tests/test-general.c b/libnm-util/tests/test-general.c
index f2f7e8ffe6..1b509f25e7 100644
--- a/libnm-util/tests/test-general.c
+++ b/libnm-util/tests/test-general.c
@@ -849,6 +849,7 @@ test_connection_diff_a_only (void)
 			{ NM_SETTING_CONNECTION_AUTOCONNECT, NM_SETTING_DIFF_RESULT_IN_A },
 			{ NM_SETTING_CONNECTION_READ_ONLY,   NM_SETTING_DIFF_RESULT_IN_A },
 			{ NM_SETTING_CONNECTION_PERMISSIONS, NM_SETTING_DIFF_RESULT_IN_A },
+			{ NM_SETTING_CONNECTION_ZONE,        NM_SETTING_DIFF_RESULT_IN_A },
 			{ NULL, NM_SETTING_DIFF_RESULT_UNKNOWN }
 		} },
 		{ NM_SETTING_WIRED_SETTING_NAME, {