diff --git a/docker/Dockerfile.test-env b/docker/Dockerfile.test-env
index aadb108845a..6adb8f9331a 100644
--- a/docker/Dockerfile.test-env
+++ b/docker/Dockerfile.test-env
@@ -155,7 +155,7 @@ RUN pip3 install --break-system-packages --no-cache-dir --upgrade setuptools pip
     pip3 install --break-system-packages --no-cache-dir cffi numba numpy==${NUMPY_VERSION} scikit-build-core[pyproject] && \
     pip3 install --break-system-packages --no-cache-dir --no-build-isolation mpi4py && \
     pip3 install --break-system-packages --no-cache-dir breathe clang-format cmakelang jupytext matplotlib mypy myst-parser nanobind==${NANOBIND_VERSION} pytest pytest-xdist ruff scipy pyamg sphinx sphinx_rtd_theme types-setuptools && \
-    pip3 install --break-system-packages --no-cache-dir cython wheel
+    pip3 install --break-system-packages --no-cache-dir wheel
 
 # Install KaHIP
 RUN wget -nc --quiet https://github.com/kahip/kahip/archive/v${KAHIP_VERSION}.tar.gz && \