diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5f2f884b92f6bd..e1f59861a2ca77 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -252,6 +252,7 @@ jobs:
         MSYSTEM: MINGW64
         NO_SVN_TESTS: 1
         GIT_TEST_SKIP_REBASE_P: 1
+        GIT_TEST_MERGE_ALGORITHM: ort
       run: |
         & .\git-sdk-64-minimal\usr\bin\bash.exe -lc @"
           # Let Git ignore the SDK and the test-cache
diff --git a/ci/lib.sh b/ci/lib.sh
index d848c036c50f92..2a869b598c7fd2 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -182,6 +182,12 @@ export DEFAULT_TEST_TARGET=prove
 export GIT_TEST_CLONE_2GB=true
 export SKIP_DASHED_BUILT_INS=YesPlease
 
+case "$jobname" in
+*-gcc)
+	export GIT_TEST_MERGE_ALGORITHM=ort
+	;;
+esac
+
 case "$jobname" in
 linux-clang|linux-gcc)
 	if [ "$jobname" = linux-gcc ]