diff --git a/Dockerfile.m4 b/Dockerfile.m4
index fbe9c04..ccc5f54 100644
--- a/Dockerfile.m4
+++ b/Dockerfile.m4
@@ -160,7 +160,7 @@ RUN meson ./build/ \
 		-D extra_tests=disabled
 RUN ninja -C ./build/
 RUN ninja -C ./build/ install
-RUN meson test -C ./build/ --print-errorlogs --suite unit --suite config --no-suite snowflake
+RUN meson test -C ./build/ -t 2 --print-errorlogs --suite unit --suite config --no-suite snowflake
 RUN setcap cap_net_bind_service=+ep /usr/sbin/kresd
 RUN file /usr/sbin/kresd
 RUN file /usr/sbin/kresc