diff --git a/tests/src/performance.test.ts b/tests/src/performance.seq.test.ts
similarity index 96%
rename from tests/src/performance.test.ts
rename to tests/src/performance.seq.test.ts
index 1322bfd597..e049e217d9 100644
--- a/tests/src/performance.test.ts
+++ b/tests/src/performance.seq.test.ts
@@ -142,11 +142,6 @@ const tryMintExplicit = async (helper: UniqueHelper, signer: IKeyringPair, token
   return tokensCount;
 };
 
-
-function sizeOfByteProperty(prop: IProperty) {
-  return sizeOfEncodedBytes(prop.key) + sizeOfEncodedBytes(prop.value!);
-}
-
 function sizeOfProperty(prop: IProperty) {
   return sizeOfEncodedStr(prop.key) + sizeOfEncodedStr(prop.value!);
 }
@@ -169,7 +164,3 @@ function sizeOfEncodedStr(v: string) {
   const encoded = UTF8_ENCODER.encode(v);
   return sizeOfInt(encoded.length) + encoded.length;
 }
-
-function sizeOfEncodedBytes(bytes: Uint8Array | string) {
-  return sizeOfInt(bytes.length) + bytes.length;
-}