diff --git a/sdk_container/src/third_party/coreos-overlay/coreos-base/oem-gce/files/manglefs.sh b/sdk_container/src/third_party/coreos-overlay/coreos-base/oem-gce/files/manglefs.sh
new file mode 100755
index 0000000000..b4db342cbe
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/coreos-base/oem-gce/files/manglefs.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -euo pipefail
+
+rootfs=${1}
+
+# Remove test stuff from python - it's quite large.
+for p in "${rootfs}"/usr/lib/python*; do
+    if [[ ! -d ${p} ]]; then
+        continue
+    fi
+    # find directories named tests or test and remove them (-prune
+    # avoids searching below those directories)
+    find "${p}" \( -name tests -o -name test \) -type d -prune -exec rm -rf '{}' '+'
+done