diff --git a/galaxycache_test.go b/galaxycache_test.go
index bc53ec46..6017191a 100644
--- a/galaxycache_test.go
+++ b/galaxycache_test.go
@@ -272,7 +272,7 @@ func TestPeers(t *testing.T) {
 				return dest.UnmarshalBinary([]byte("got:" + key))
 			}
 
-			testGalaxy := universe.NewGalaxy("TestPeers-galaxy", tc.cacheSize, GetterFunc(getter), WithPromoter(&promoter.ProbabilisticPromoter{10}))
+			testGalaxy := universe.NewGalaxy("TestPeers-galaxy", tc.cacheSize, GetterFunc(getter), WithPromoter(&promoter.ProbabilisticPromoter{ProbDenominator: 10}))
 
 			if tc.initFunc != nil {
 				tc.initFunc(testGalaxy, testproto.TestFetchers)