diff --git a/libnm-util/tests/test-general.c b/libnm-util/tests/test-general.c
index 7c5399dfa3..1c88752f27 100644
--- a/libnm-util/tests/test-general.c
+++ b/libnm-util/tests/test-general.c
@@ -889,6 +889,7 @@ test_connection_diff_a_only (void)
 			{ NM_SETTING_WIRED_S390_SUBCHANNELS,      NM_SETTING_DIFF_RESULT_IN_A },
 			{ NM_SETTING_WIRED_S390_NETTYPE,          NM_SETTING_DIFF_RESULT_IN_A },
 			{ NM_SETTING_WIRED_S390_OPTIONS,          NM_SETTING_DIFF_RESULT_IN_A },
+			{ NM_SETTING_WIRED_CARRIER_DETECT,        NM_SETTING_DIFF_RESULT_IN_A },
 			{ NULL, NM_SETTING_DIFF_RESULT_UNKNOWN },
 		} },
 		{ NM_SETTING_IP4_CONFIG_SETTING_NAME, {