diff --git a/test/is_github_actions.bats b/test/is_github_actions.bats
new file mode 100644
index 0000000..728c57f
--- /dev/null
+++ b/test/is_github_actions.bats
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+setup_file () {
+  load 'test_helper/common-setup'
+  _common_setup
+}
+
+setup () {
+  load 'test_helper/bats-assert/load'
+  load 'test_helper/bats-support/load'
+}
+
+@test "is_github_actions()" {
+  source "${PROJECT_ROOT}/src/functions.sh"
+
+  run is_github_actions
+  assert_failure 1
+
+  GITHUB_ACTIONS="1"
+  run is_github_actions
+  assert_success
+}
+
+teardown () {
+  export \
+    GITHUB_ACTIONS=""
+}