diff --git a/testing/external/scripts/perftools-adapt-paths b/testing/external/scripts/perftools-adapt-paths
new file mode 100755
index 0000000000..2eda2477c7
--- /dev/null
+++ b/testing/external/scripts/perftools-adapt-paths
@@ -0,0 +1,10 @@
+#! /usr/bin/env bash
+#
+# Adapts relative paths in perftools stderr output to work
+# directly from the top-level test directory.
+#
+# Returns an exit code > 0 if there's a leak.
+
+cat $1 | sed "s#bro *\"\./#../../../build/src/bro \".tmp/$TEST_NAME/#g" | sed 's/ *--gv//g' >$1.tmp && mv $1.tmp $1
+
+grep -q "No leaks found" $1