diff --git a/docker/Dockerfile b/docker/Dockerfile
index 506dee8..48a551c 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -2,6 +2,7 @@ FROM flounder5/runner-bash:v0.0.3
 
 RUN apt-get update && \
     apt-get install -y \
-        shellcheck && \
+        shellcheck \
+        shunit2 && \
     apt-get autoremove -y && \
     rm -rf /var/lib/apt/lists/*
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