diff --git a/test/http.go b/test/http.go
index 84207762d..8cd83d0a6 100644
--- a/test/http.go
+++ b/test/http.go
@@ -68,7 +68,7 @@ func ListenAndServe(t *testing.T, router http.Handler, withTLS bool) (apiURL str
 		if withTLS {
 			certFile := filepath.Join(t.TempDir(), "dendrite.cert")
 			keyFile := filepath.Join(t.TempDir(), "dendrite.key")
-			err = NewTLSKey(keyFile, certFile, 64)
+			err = NewTLSKey(keyFile, certFile, 1024)
 			if err != nil {
 				t.Errorf("failed to make TLS key: %s", err)
 				return