diff --git a/docker/dev.dockerfile b/docker/dev.dockerfile
index db0c2dd..c202180 100644
--- a/docker/dev.dockerfile
+++ b/docker/dev.dockerfile
@@ -43,5 +43,7 @@ RUN apt-get update && \
     update-alternatives --install /usr/bin/clang clang /usr/bin/clang-${LLVM_VERSION} 60 && \
     update-alternatives --install /usr/bin/opt opt /usr/bin/opt-${LLVM_VERSION} 60 && \
     rm -rf /var/lib/apt/lists/*
-RUN pip install pytest pytest-xdist
+RUN pip install \
+      pytest==7.1.3 \
+      pytest-xdist==2.5.0
 # TODO(lb): Sphinx, Mypy