diff --git a/test/SafeProtocolRegistry.spec.ts b/test/SafeProtocolRegistry.spec.ts
index 846e83d9..87b315fe 100644
--- a/test/SafeProtocolRegistry.spec.ts
+++ b/test/SafeProtocolRegistry.spec.ts
@@ -68,7 +68,22 @@ describe("SafeProtocolRegistry", async () => {
 
     it("Should return true when valid interfaceId is passed", async () => {
         const { safeProtocolRegistry } = await loadFixture(deployContractFixture);
-        expect(await safeProtocolRegistry.supportsInterface("0x01ffc9a7")).to.be.equal(true);
-        expect(await safeProtocolRegistry.supportsInterface("0xc23697a8")).to.be.equal(true);
+        expect(await safeProtocolRegistry.supportsInterface("0x01ffc9a7")).to.be.true;
+        expect(await safeProtocolRegistry.supportsInterface("0xc23697a8")).to.be.true;
+    });
+
+    it("Should return false when invalid interfaceId is passed", async () => {
+        const { safeProtocolRegistry } = await loadFixture(deployContractFixture);
+        expect(await safeProtocolRegistry.supportsInterface("0x00000000")).to.be.false;
+
+        // Generate random interfaceId remove supported interfaceIds
+        const excludedWords = ["0x01ffc9a7", "0xc23697a8"];
+        const randomHexString =
+            "0x" +
+            (Math.random().toString(16).slice(2, 10) + "00000000")
+                .substring(0, 8)
+                .replace(new RegExp(`(${excludedWords.join("|")})|0x`, "gi"), "");
+
+        expect(await safeProtocolRegistry.supportsInterface(randomHexString)).to.be.false;
     });
 });