diff --git a/tests/purge_chain_works.rs b/tests/purge_chain_works.rs
index 8aeace032a41..3e9a37814781 100644
--- a/tests/purge_chain_works.rs
+++ b/tests/purge_chain_works.rs
@@ -55,9 +55,9 @@ async fn purge_chain_rocksdb_works() {
 	kill(Pid::from_raw(cmd.id().try_into().unwrap()), SIGINT).unwrap();
 	// Wait for the node to handle it and exit.
 	assert!(common::wait_for(&mut cmd, 30).map(|x| x.success()).unwrap_or_default());
-	assert!(tmpdir.path().join("chains/polkadot-dev").exists());
-	assert!(tmpdir.path().join("chains/polkadot-dev/db/full").exists());
-	assert!(tmpdir.path().join("chains/polkadot-dev/db/full/parachains").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev/db/full").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev/db/full/parachains").exists());
 
 	// Purge chain
 	let status = Command::new(cargo_bin("polkadot"))
@@ -69,8 +69,8 @@ async fn purge_chain_rocksdb_works() {
 	assert!(status.success());
 
 	// Make sure that the chain folder exists, but `db/full` is deleted.
-	assert!(tmpdir.path().join("chains/polkadot-dev").exists());
-	assert!(!tmpdir.path().join("chains/polkadot-dev/db/full").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev").exists());
+	assert!(!tmpdir.path().join("chains/polkadot_dev/db/full").exists());
 }
 
 #[tokio::test]
@@ -105,9 +105,9 @@ async fn purge_chain_paritydb_works() {
 	kill(Pid::from_raw(cmd.id().try_into().unwrap()), SIGINT).unwrap();
 	// Wait for the node to handle it and exit.
 	assert!(common::wait_for(&mut cmd, 30).map(|x| x.success()).unwrap_or_default());
-	assert!(tmpdir.path().join("chains/polkadot-dev").exists());
-	assert!(tmpdir.path().join("chains/polkadot-dev/paritydb/full").exists());
-	assert!(tmpdir.path().join("chains/polkadot-dev/paritydb/parachains").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev/paritydb/full").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev/paritydb/parachains").exists());
 
 	// Purge chain
 	let status = Command::new(cargo_bin("polkadot"))
@@ -121,8 +121,8 @@ async fn purge_chain_paritydb_works() {
 	assert!(status.success());
 
 	// Make sure that the chain folder exists, but `db/full` is deleted.
-	assert!(tmpdir.path().join("chains/polkadot-dev").exists());
-	assert!(!tmpdir.path().join("chains/polkadot-dev/paritydb/full").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev").exists());
+	assert!(!tmpdir.path().join("chains/polkadot_dev/paritydb/full").exists());
 	// Parachains removal requires calling "purge-chain --parachains".
-	assert!(tmpdir.path().join("chains/polkadot-dev/paritydb/parachains").exists());
+	assert!(tmpdir.path().join("chains/polkadot_dev/paritydb/parachains").exists());
 }