diff -r 8a34b9a882bb -r c54170ee898b src/HOL/TPTP/lib/Tools/tptp_isabelle
--- a/src/HOL/TPTP/lib/Tools/tptp_isabelle	Fri May 24 11:08:22 2013 +0200
+++ b/src/HOL/TPTP/lib/Tools/tptp_isabelle	Fri May 24 11:08:25 2013 +0200
@@ -29,5 +29,5 @@
   echo "theory $SCRATCH imports \"$TPTP_HOME/ATP_Problem_Import\" begin \
 ML {* ATP_Problem_Import.isabelle_tptp_file @{theory} ($TIMEOUT) \"$FILE\" *} end;" \
     > /tmp/$SCRATCH.thy
-  "$ISABELLE_PROCESS" -e "use_thy \"/tmp/$SCRATCH\"; exit 1;" HOL-TPTP | grep --line-buffered -v "^###\|^PROOF FAILED for depth\|^Failure node\|inferences so far.  Searching to depth\|^val it = (): unit"
+  "$ISABELLE_PROCESS" -q -e "use_thy \"/tmp/$SCRATCH\"; exit 1;" HOL-TPTP | grep --line-buffered -v "^###\|^PROOF FAILED for depth\|^Failure node\|inferences so far.  Searching to depth\|^val it = (): unit"
 done