diff --git a/src/libutil-tests/file-system.cc b/src/libutil-tests/file-system.cc
index 7ef804f3403..2c10d486986 100644
--- a/src/libutil-tests/file-system.cc
+++ b/src/libutil-tests/file-system.cc
@@ -261,4 +261,18 @@ TEST(pathExists, bogusPathDoesNotExist)
 {
     ASSERT_FALSE(pathExists("/schnitzel/darmstadt/pommes"));
 }
+
+/* ----------------------------------------------------------------------------
+ * makeParentCanonical
+ * --------------------------------------------------------------------------*/
+
+TEST(makeParentCanonical, noParent)
+{
+    ASSERT_EQ(makeParentCanonical("file"), absPath(std::filesystem::path("file")));
+}
+
+TEST(makeParentCanonical, root)
+{
+    ASSERT_EQ(makeParentCanonical("/"), "/");
+}
 }