diff --git a/Dockerfile b/Dockerfile
index 6e50be1..034856d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,8 @@ RUN uv sync --no-dev --frozen
 
 # Isolated CI checks; development dependencies do not enter the runtime image.
 FROM builder AS test
+# Real-Git transport fixtures require Git only in the isolated test image.
+RUN apt-get update && apt-get install -y --no-install-recommends git && rm -rf /var/lib/apt/lists/*
 COPY tests/ ./tests/
 COPY Dockerfile ./Dockerfile
 COPY .forgejo/workflows/image.yaml ./.forgejo/workflows/image.yaml