diff --git a/run b/run
index 8033eaf18..6fe8ce919 100755
--- a/run
+++ b/run
@@ -806,7 +806,9 @@ test() {
 
 install_python_test_deps_() {
     if [ -n "${CONDA_PREFIX}" ]; then
-        run_command conda install -c conda-forge -y \
+        # https://github.com/rapidsai/cucim/pull/349#issuecomment-1203335731
+        # Do not update or change already-installed dependencies.
+        run_command conda install -c conda-forge -y --freeze-installed \
             --file ${TOP}/python/cucim/requirements-test.txt
     else
         if [ -n "${VIRTUAL_ENV}" ]; then