diff --git a/.github/workflows/GNU.yml b/.github/workflows/GNU.yml
index 6739a12b59..fb2e231d4a 100644
--- a/.github/workflows/GNU.yml
+++ b/.github/workflows/GNU.yml
@@ -88,7 +88,7 @@ jobs:
         GNULIB_DIR="${PWD}/gnulib"
         pushd gnu
 
-        unbuffer timeout -sKILL 4h make -j "$(nproc)" check SUBDIRS=. RUN_EXPENSIVE_TESTS=yes RUN_VERY_EXPENSIVE_TESTS=yes VERBOSE=no || : # Kill after 4 hours in case something gets stuck in make
+        timeout -sKILL 4h make -j "$(nproc)" check SUBDIRS=. RUN_EXPENSIVE_TESTS=yes RUN_VERY_EXPENSIVE_TESTS=yes VERBOSE=no || : # Kill after 4 hours in case something gets stuck in make
     - name: Extract tests info
       shell: bash
       run: |