diff --git a/cosmo-all/Dockerfile b/cosmo-all/Dockerfile
index 6348491..05cabf0 100644
--- a/cosmo-all/Dockerfile
+++ b/cosmo-all/Dockerfile
@@ -28,6 +28,7 @@ RUN --mount=type=cache,id=cosmo-build-all,target=/cosmopolitan/o,sharing=locked
 \
 # skip some checks that are currently failing: \
  && skip() { mkdir -p "${1%/*}" && touch -d @2222222222 "$1" ;} \
+ && skip "o/$mode/test/libc/calls/ftruncate_test.com.runs" \
  && skip "o/$mode/test/libc/calls/getgroups_test.com.runs" \
  && skip "o/$mode/test/libc/calls/getpriority_test.com.runs" \
 # these can fail in nested podman: \