diff --git a/sequoia-wot-vectors/src/testFixtures/kotlin/org/sequoia_pgp/wot/vectors/ArtifactVectors.kt b/sequoia-wot-vectors/src/testFixtures/kotlin/org/sequoia_pgp/wot/vectors/ArtifactVectors.kt
index b06792d9..93a5d749 100644
--- a/sequoia-wot-vectors/src/testFixtures/kotlin/org/sequoia_pgp/wot/vectors/ArtifactVectors.kt
+++ b/sequoia-wot-vectors/src/testFixtures/kotlin/org/sequoia_pgp/wot/vectors/ArtifactVectors.kt
@@ -38,7 +38,7 @@ interface ArtifactVectors {
 
     fun getResourceName(): String
 
-    fun getNetworkAt(referenceTime: ReferenceTime, policy: Policy = PGPainless.getPolicy()): Network {
+    fun getNetworkAt(referenceTime: ReferenceTime = ReferenceTime.now(), policy: Policy = PGPainless.getPolicy()): Network {
         val inputStream = keyRingInputStream()
         val keyRing = PGPainless.readKeyRing().publicKeyRingCollection(inputStream)
         val store = KeyRingCertificateStore(keyRing)