diff --git a/ci/run-build-and-tests.sh b/ci/run-build-and-tests.sh
index 280dda7d28..4066afb5bf 100755
--- a/ci/run-build-and-tests.sh
+++ b/ci/run-build-and-tests.sh
@@ -51,4 +51,8 @@ esac
 make $MAKE_TARGETS
 check_unignored_build_artifacts
 
+case " $MAKE_TARGETS " in
+*" all "*) make -C contrib/subtree test;;
+esac
+
 save_good_tree
diff --git a/ci/run-test-slice.sh b/ci/run-test-slice.sh
index f8c2c3106a..e7f0f923cc 100755
--- a/ci/run-test-slice.sh
+++ b/ci/run-test-slice.sh
@@ -14,4 +14,7 @@ make --quiet -C t T="$(cd t &&
 	./helper/test-tool path-utils slice-tests "$1" "$2" t[0-9]*.sh |
 	tr '\n' ' ')"
 
+# Run the git subtree tests only if main tests succeeded
+test 0 != "$1" || make -C contrib/subtree test
+
 check_unignored_build_artifacts