diff --git a/.github/ci-nightly-test.sh b/.github/ci-nightly-test.sh
index 5c8a35ef8..cf0ddd4b1 100644
--- a/.github/ci-nightly-test.sh
+++ b/.github/ci-nightly-test.sh
@@ -16,7 +16,7 @@ version=$(cat $TMPDIR/eccodes/VERSION)
 
 regression_suite_dir=$TMPDIR/eccodes-regression-tests
 mkdir -p $regression_suite_dir
-git clone https://github.com/ecmwf/eccodes.git $regression_suite_dir
+git clone git@github.com:ecmwf/eccodes-regression-tests.git $regression_suite_dir
 cd $regression_suite_dir
 ./par-suite.sh -w $TMPDIR/install/eccodes/$version