diff --git a/test/utils/topic.test.ts b/test/utils/topic.test.ts
new file mode 100644
index 000000000..d28bc379b
--- /dev/null
+++ b/test/utils/topic.test.ts
@@ -0,0 +1,26 @@
+import { buildContentTopic, isValidTopic } from '../../src/utils/topic'
+
+describe('topic utils', () => {
+  describe('isValidTopic', () => {
+    it('validates topics correctly', () => {
+      expect(isValidTopic(buildContentTopic('foo'))).toBe(true)
+      expect(isValidTopic(buildContentTopic('123'))).toBe(true)
+      expect(isValidTopic(buildContentTopic('bar987'))).toBe(true)
+      expect(isValidTopic(buildContentTopic('*&+-)'))).toBe(true)
+      expect(isValidTopic(buildContentTopic('%#@='))).toBe(true)
+      expect(isValidTopic(buildContentTopic('<;.">'))).toBe(true)
+      expect(isValidTopic(buildContentTopic(String.fromCharCode(33)))).toBe(
+        true
+      )
+      expect(isValidTopic(buildContentTopic('∫ß'))).toBe(false)
+      expect(isValidTopic(buildContentTopic('\xA9'))).toBe(false)
+      expect(isValidTopic(buildContentTopic('\u2665'))).toBe(false)
+      expect(isValidTopic(buildContentTopic(String.fromCharCode(1)))).toBe(
+        false
+      )
+      expect(isValidTopic(buildContentTopic(String.fromCharCode(23)))).toBe(
+        false
+      )
+    })
+  })
+})