diff --git a/dockerimg/update_tests.sh b/dockerimg/update_tests.sh
new file mode 100755
index 0000000..5a42f7b
--- /dev/null
+++ b/dockerimg/update_tests.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+CURRENT_DIR=$(pwd)
+
+if [ "$SCRIPT_DIR" != "$CURRENT_DIR" ]; then
+    echo "Error: This script must be run from its own directory: $SCRIPT_DIR" >&2
+    exit 1
+fi
+
+go test -httprecord ".*" -rewritewant