1 file changed, 9 insertions, 2 deletions
diff --git a/tests/setup.sh b/tests/setup.sh
index a083f75..4eab52c 100755
--- a/tests/setup.sh
+++ b/tests/setup.sh
@@ -35,8 +35,15 @@ IFS=$LF
 set -- $test_argv
 IFS=$OLDIFS
 
-: ${TEST_DIRECTORY=$(pwd)/../vendor/git/t}
-: ${TEST_OUTPUT_DIRECTORY=$(pwd)}
+# The library takes these from the environment when they are set there, so
+# they are set outright, or a shell set up for work on Git itself would point
+# the suite at another library and every path below at another tree. The
+# fixtures and many tests name master, which the library would otherwise take
+# from the same environment, or from a Git built with its breaking changes.
+TEST_DIRECTORY=$(pwd)/../vendor/git/t
+TEST_OUTPUT_DIRECTORY=$(pwd)
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 # The library would otherwise leave a repository of its own in the trash
 # directory, and every repository these tests want is built by mkrepo below.
 TEST_NO_CREATE_REPO=YesPlease