diff --git a/meta/recipes-devtools/tcltk/tcl/run-ptest b/meta/recipes-devtools/tcltk/tcl/run-ptest
index be067f13ea..2135b17074 100644
--- a/meta/recipes-devtools/tcltk/tcl/run-ptest
+++ b/meta/recipes-devtools/tcltk/tcl/run-ptest
@@ -15,7 +15,7 @@ SKIP="$SKIP exit-1.\*"
 # 15407 15421
 SKIP="$SKIP \*io-46.1"
 # io-13.6 explicitly says it can fail on slow/loaded machines
-SKIP="$SKIP io-13.6"
+SKIP="$SKIP \*io-13.6"
 # 14825
 SKIP="$SKIP socket-\* socket_inet-\*"
 # tries to access google.com
diff --git a/meta/recipes-devtools/tcltk8/tcl8/run-ptest b/meta/recipes-devtools/tcltk8/tcl8/run-ptest
index bea9d9ccfd..dd46ebdeaa 100644
--- a/meta/recipes-devtools/tcltk8/tcl8/run-ptest
+++ b/meta/recipes-devtools/tcltk8/tcl8/run-ptest
@@ -16,7 +16,7 @@ SKIP="$SKIP exit-1.\*"
 # 15407 15421
 SKIP="$SKIP \*io-46.1"
 # io-13.6 explicitly says it can fail on slow/loaded machines
-SKIP="$SKIP io-13.6"
+SKIP="$SKIP \*io-13.6"
 # 14825
 SKIP="$SKIP socket-\* socket_inet-\*"