diff --git a/src/main.spec.ts b/src/main.spec.ts
index aa92cff..2686db0 100644
--- a/src/main.spec.ts
+++ b/src/main.spec.ts
@@ -246,6 +246,16 @@ describe("TagIncrementer", () => {
 
       expect(result).toBe(IncrementType.MINOR);
     });
+
+    it("should fallback to PATCH on an non-conventional commit message", async () => {
+      mockGitService.setMockCommit({
+        commit: { message: "just some tests, nothing special" },
+      });
+
+      const result = await tagIncrementer.determineIncrementType("ref");
+
+      expect(result).toBe(IncrementType.PATCH);
+    });
   });
 
   describe("incrementTag", () => {