diff --git a/test/setup_suite.bash b/test/setup_suite.bash
new file mode 100644
index 00000000..549b195b
--- /dev/null
+++ b/test/setup_suite.bash
@@ -0,0 +1,9 @@
+setup_suite() {
+  # Unset ASDF_DIR because it may already be set by the users shell, and some
+  # tests fail when it is set to something other than the temp dir.
+  unset ASDF_DIR
+
+  # Set an agnostic Git configuration directory to prevent personal
+  # configuration from interfering with the tests
+  export GIT_CONFIG_GLOBAL=/dev/null
+}
diff --git a/test/test_helpers.bash b/test/test_helpers.bash
index 1704fce7..354d087d 100644
--- a/test/test_helpers.bash
+++ b/test/test_helpers.bash
@@ -1,9 +1,5 @@
 #!/usr/bin/env bash
 
-# Unset ASDF_DIR because it may already be set by the users shell, and some
-# tests fail when it is set to something other than the temp dir.
-unset ASDF_DIR
-
 # shellcheck source=lib/utils.bash
 . "$(dirname "$BATS_TEST_DIRNAME")"/lib/utils.bash