diff --git a/calculate_average_ddimtirov.sh b/calculate_average_ddimtirov.sh
old mode 100644
new mode 100755
diff --git a/test.sh b/test.sh
index 16308bab5..4bec03641 100755
--- a/test.sh
+++ b/test.sh
@@ -15,19 +15,16 @@
 #  limitations under the License.
 #
 
-if [ -z "$1" ]
-  then
-    echo "Usage: test.sh <fork name>"
-    exit 1
-fi
-
-java --version
+set -euo pipefail
 
-mvn clean verify
+if [ -z "$1" ]; then
+  echo "Usage: test.sh <fork name>"
+  exit 1
+fi
 
-for sample in $(ls src/test/resources/samples/*.txt)
-do
+for sample in $(ls src/test/resources/samples/*.txt); do
   echo "Validating calculate_average_$1.sh -- $sample"
+
   rm -f measurements.txt
   ln -s $sample measurements.txt
 
diff --git a/test_all.sh b/test_all.sh
new file mode 100755
index 000000000..e1141d7b2
--- /dev/null
+++ b/test_all.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+#  Copyright 2023 The original authors
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+set -euo pipefail
+
+for impl in $(ls calculate_average_*.sh | sort); do
+  noext="${impl%%.sh}"
+  name=${noext##calculate_average_}
+
+  if output=$(./test.sh "$name" 2>&1); then
+    echo "PASS $name"
+  else
+    echo "FAIL $name"
+    echo "$output" 1>&2
+  fi
+done