diff --git a/sbin/ping/ping6.c b/sbin/ping/ping6.c
--- a/sbin/ping/ping6.c
+++ b/sbin/ping/ping6.c
@@ -580,7 +580,7 @@
 		case 'W':
 			t = strtod(optarg, &e);
 			if (*e || e == optarg || t > (double)INT_MAX)
-				err(EX_USAGE, "invalid timing interval: `%s'",
+				errx(EX_USAGE, "invalid timing interval: `%s'",
 				    optarg);
 			options |= F_WAITTIME;
 			waittime = (int)t;
diff --git a/sbin/ping/tests/test_ping.py b/sbin/ping/tests/test_ping.py
--- a/sbin/ping/tests/test_ping.py
+++ b/sbin/ping/tests/test_ping.py
@@ -736,7 +736,6 @@
                 "stdout": "",
                 "stderr": "ping: invalid timing interval: `x'\n",
             },
-            marks=pytest.mark.skip("XXX currently failing"),
             id="_Wx_localhost",
         ),
     ]