diff --git a/Dockerfile.phptest b/Dockerfile.phptest
index 64d94ae..65da0d2 100644
--- a/Dockerfile.phptest
+++ b/Dockerfile.phptest
@@ -6,7 +6,9 @@ FROM registry.leenooks.net/leenooks/php:8.0-fpm-latest
 RUN pecl install xdebug \
 	&& docker-php-ext-enable xdebug
 
-RUN apt-get update && apt-get install -y npm \
-        && apt-get -y autoremove \
-        && apt-get clean \
-        && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+RUN mv /sbin/init /sbin/init.orig \
+	&& apt-get update && apt-get install -y npm \
+	&& apt-get -y autoremove \
+	&& apt-get clean \
+	&& mv /sbin/init.orig /sbin/init \
+	&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*