diff --git a/src/libCom/test/epicsSockResolveTest.c b/src/libCom/test/epicsSockResolveTest.c
index 83075d2cc..2a0878245 100644
--- a/src/libCom/test/epicsSockResolveTest.c
+++ b/src/libCom/test/epicsSockResolveTest.c
@@ -52,7 +52,7 @@ MAIN(epicsSockResolveTest)
     {
         struct in_addr addr;
 
-        if (hostToIPAddr("obviously.invalid.host", &addr) == 0) {
+        if (hostToIPAddr("obviously-invalid-host", &addr) == 0) {
             testAbort("hostToIPAddr() is broken, testing not possible");
         }
     }