diff --git a/projects/libidn2/Dockerfile b/projects/libidn2/Dockerfile
index e90a6059fa73..226d4bfb0c89 100644
--- a/projects/libidn2/Dockerfile
+++ b/projects/libidn2/Dockerfile
@@ -20,4 +20,4 @@ RUN apt-get update && apt-get install -y make autoconf automake gettext libtool
 RUN git clone --recursive https://gitlab.com/libidn/libidn2.git
 
 WORKDIR libidn2
-COPY build.sh replay_build.sh $SRC/
+COPY run_tests.sh build.sh replay_build.sh $SRC/
diff --git a/projects/libidn2/run_tests.sh b/projects/libidn2/run_tests.sh
new file mode 100644
index 000000000000..1a973203e9b1
--- /dev/null
+++ b/projects/libidn2/run_tests.sh
@@ -0,0 +1,19 @@
+#!/bin/bash -eu
+#
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+make check -C tests -j$(nproc)