diff --git a/Makefile.am b/Makefile.am
index bb950ee9f..243166b3f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,7 +119,7 @@ test_bitcoin_filtered.info: test_bitcoin.info
 
 block_test.info: test_bitcoin_filtered.info
 	$(MKDIR_P) qa/tmp
-	-@TIMEOUT=15 qa/pull-tester/run-bitcoind-for-test.sh $(JAVA) -jar $(JAVA_COMPARISON_TOOL) qa/tmp/compTool 0 18444
+	-@TIMEOUT=15 qa/pull-tester/run-bitcoind-for-test.sh $(JAVA) -jar $(JAVA_COMPARISON_TOOL) qa/tmp/compTool 0
 	$(LCOV) -c -d $(abs_builddir)/src --t BitcoinJBlockTest -o $@
 	$(LCOV) -z -d $(abs_builddir)/src
 	$(LCOV) -z -d $(abs_builddir)/src/leveldb
@@ -148,7 +148,7 @@ endif
 if USE_COMPARISON_TOOL
 check-local:
 	$(MKDIR_P) qa/tmp
-	@qa/pull-tester/run-bitcoind-for-test.sh $(JAVA) -jar $(JAVA_COMPARISON_TOOL) qa/tmp/compTool $(COMPARISON_TOOL_REORG_TESTS) 18444
+	@qa/pull-tester/run-bitcoind-for-test.sh $(JAVA) -jar $(JAVA_COMPARISON_TOOL) qa/tmp/compTool $(COMPARISON_TOOL_REORG_TESTS)
 endif
 
 EXTRA_DIST = $(top_srcdir)/share/genbuild.sh qa/pull-tester/pull-tester.sh $(WINDOWS_PACKAGING) $(OSX_PACKAGING)
diff --git a/qa/pull-tester/run-bitcoind-for-test.sh.in b/qa/pull-tester/run-bitcoind-for-test.sh.in
index e8bcb4bf7..4eef8202c 100755
--- a/qa/pull-tester/run-bitcoind-for-test.sh.in
+++ b/qa/pull-tester/run-bitcoind-for-test.sh.in
@@ -5,7 +5,8 @@ mkdir -p "$DATADIR"/regtest
 touch "$DATADIR/regtest/debug.log"
 tail -q -n 1 -F "$DATADIR/regtest/debug.log" | grep -m 1 -q "Done loading" &
 WAITER=$!
-"@abs_top_builddir@/src/bitcoind@EXEEXT@" -connect=0.0.0.0 -datadir="$DATADIR" -rpcuser=user -rpcpassword=pass -listen -keypool=3 -debug -debug=net -logtimestamps -port=18444 -regtest &
+PORT=`expr $BASHPID + 10000`
+"@abs_top_builddir@/src/bitcoind@EXEEXT@" -connect=0.0.0.0 -datadir="$DATADIR" -rpcuser=user -rpcpassword=pass -listen -keypool=3 -debug -debug=net -logtimestamps -port=$PORT -regtest &
 BITCOIND=$!
 
 #Install a watchdog.
@@ -13,10 +14,10 @@ BITCOIND=$!
 wait $WAITER
 
 if [ -n "$TIMEOUT" ]; then
-  timeout "$TIMEOUT"s "$@"
+  timeout "$TIMEOUT"s "$@" $PORT
   RETURN=$?
 else
-  "$@"
+  "$@" $PORT
   RETURN=$?
 fi