diff --git a/cardano-testnet/src/Testnet/Components/Configuration.hs b/cardano-testnet/src/Testnet/Components/Configuration.hs
index 5cf18b357d2..0e8c67946f7 100644
--- a/cardano-testnet/src/Testnet/Components/Configuration.hs
+++ b/cardano-testnet/src/Testnet/Components/Configuration.hs
@@ -187,7 +187,7 @@ createSPOGenesisAndFiles nPoolNodes nDelReps maxSupply asbe@(AnyShelleyBasedEra
 
   return genesisShelleyDir
   where
-    genesisInputFilepath e = "genesis-input." <> anyEraToString (AnyCardanoEra e) <> ".json"
+    genesisInputFilepath e = "genesis-input." <> eraToString e <> ".json"
 
 ifaceAddress :: String
 ifaceAddress = "127.0.0.1"