diff --git a/pkg/testing/ca/ca.go b/pkg/testing/ca/ca.go
index df1e37ec..553e6df3 100644
--- a/pkg/testing/ca/ca.go
+++ b/pkg/testing/ca/ca.go
@@ -423,7 +423,7 @@ func generateTimestampingResponse(sig []byte, tsaCert *x509.Certificate, tsaKey
 		ExtraExtensions: req.Extensions,
 	}
 
-	return tsTemplate.CreateResponse(tsaCert, tsaKey)
+	return tsTemplate.CreateResponseWithOpts(tsaCert, tsaKey, hash)
 }
 
 func (ca *VirtualSigstore) TSACertificateAuthorities() []root.CertificateAuthority {