diff --git a/tests/init.cfg b/tests/init.cfg
index f577d2b..0bd5aa2 100644
--- a/tests/init.cfg
+++ b/tests/init.cfg
@@ -43,6 +43,8 @@ require_timeout_()
     || skip_ your system lacks the timeout program
   returns_ 1 timeout 10s false \
     || skip_ your system has a non-GNU timeout program
+  returns_ 124 timeout 0.01 sleep 0.02 \
+    || skip_ "'timeout 0.01 sleep 0.02' did not time out"
 }
 
 require_pcre_()