diff --git a/Dockerfile b/Dockerfile
index 126764b5..600a2730 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM openjdk:8-jdk as build
 RUN apt-get update
 COPY . /project
 WORKDIR /project
-RUN ./gradlew build -x test
+RUN ./gradlew build -PexcludeTests="**/SeleniumTest*"
 
 FROM itzg/minecraft-server:java8
 COPY --from=build /project/web/build/libs/*-all.jar /mods/
diff --git a/build.gradle b/build.gradle
index e77b5224..706707fd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -71,6 +71,11 @@ subprojects {
     }
 
     test {
+        // https://github.com/OASIS-learn-study/minecraft-storeys-maker/pull/265/
+        if (project.hasProperty('excludeTests')) {
+            exclude project.property('excludeTests')
+        }
+
         testLogging {
             // more verbose, but sometimes useful; see e.g. https://github.com/vorburger/minecraft-storeys-maker/pull/16
             events "failed", "passed", "skipped"