diff --git a/test/lib/trim-test.sh b/test/lib/trim-test.sh
new file mode 100755
index 0000000..1c03c57
--- /dev/null
+++ b/test/lib/trim-test.sh
@@ -0,0 +1,7 @@
+#! /usr/bin/env bash
+source "../assert.sh"
+
+source "../../src/lib/trim.sh"
+
+assert 'trim "  foo bar  "' "foo bar"
+assert_end "trim()"