diff --git a/src/nativeTest/kotlin/dn42/m724/auth/pgp/PgpSignatureVerificationTest.kt b/src/nativeTest/kotlin/dn42/m724/auth/pgp/PgpSignatureVerificationTest.kt
index 4b00c2a..1864c52 100644
--- a/src/nativeTest/kotlin/dn42/m724/auth/pgp/PgpSignatureVerificationTest.kt
+++ b/src/nativeTest/kotlin/dn42/m724/auth/pgp/PgpSignatureVerificationTest.kt
@@ -79,4 +79,18 @@ class PgpSignatureVerificationTest {
             checker.verify("simple message", invalidFingerprint, detachedSignature)
         }
     }
+
+    @Test
+    fun `verify should fail for empty input data`() {
+        shouldThrow<Exception> {
+            checker.verify("simple message", invalidFingerprint, "")
+        }
+    }
+
+    @Test
+    fun `verify should fail for empty fingerprint data`() {
+        shouldThrow<Exception> {
+            checker.verify("simple message", "", detachedSignature)
+        }
+    }
 }
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