diff --git a/tests/private/ethcallsigs.nim b/tests/private/ethcallsigs.nim
index 5d798f0..235cb04 100644
--- a/tests/private/ethcallsigs.nim
+++ b/tests/private/ethcallsigs.nim
@@ -31,7 +31,7 @@ proc eth_call(call: EthCall, quantityTag: string): UInt256
 proc eth_estimateGas(call: EthCall, quantityTag: string): UInt256
 proc eth_getBlockByHash(data: array[32, byte], fullTransactions: bool): BlockObject
 proc eth_getBlockByNumber(quantityTag: string, fullTransactions: bool): BlockObject
-proc eth_getTransactionByHash(data: Uint256): TransactionObject
+proc eth_getTransactionByHash(data: UInt256): TransactionObject
 proc eth_getTransactionByBlockHashAndIndex(data: UInt256, quantity: int): TransactionObject
 proc eth_getTransactionByBlockNumberAndIndex(quantityTag: string, quantity: int): TransactionObject
 proc eth_getTransactionReceipt(data: UInt256): ReceiptObject
@@ -45,8 +45,8 @@ proc eth_newBlockFilter(): int
 proc eth_newPendingTransactionFilter(): int
 proc eth_uninstallFilter(filterId: int): bool
 proc eth_getWork(): seq[UInt256]
-proc eth_submitWork(nonce: int64, powHash: Uint256, mixDigest: Uint256): bool
-proc eth_submitHashrate(hashRate: UInt256, id: Uint256): bool
+proc eth_submitWork(nonce: int64, powHash: UInt256, mixDigest: UInt256): bool
+proc eth_submitHashrate(hashRate: UInt256, id: UInt256): bool
 proc shh_post(): string
 proc shh_newIdentity(): array[60, byte]
 proc shh_hasIdentity(identity: array[60, byte]): bool
diff --git a/tests/private/ethprocs.nim b/tests/private/ethprocs.nim
index 471ec53..d2580c4 100644
--- a/tests/private/ethprocs.nim
+++ b/tests/private/ethprocs.nim
@@ -248,7 +248,7 @@ proc addEthRpcs*(server: RpcServer) =
     ## Returns BlockObject or nil when no block was found.
     discard
 
-  server.rpc("eth_getTransactionByHash") do(data: Uint256) -> TransactionObject:
+  server.rpc("eth_getTransactionByHash") do(data: UInt256) -> TransactionObject:
     ## Returns the information about a transaction requested by transaction hash.
     ##
     ## data: hash of a transaction.
@@ -380,7 +380,7 @@ proc addEthRpcs*(server: RpcServer) =
     ## DATA, 32 Bytes - the boundary condition ("target"), 2^256 / difficulty.
     result = @[]
 
-  server.rpc("eth_submitWork") do(nonce: int64, powHash: Uint256, mixDigest: Uint256) -> bool:
+  server.rpc("eth_submitWork") do(nonce: int64, powHash: UInt256, mixDigest: UInt256) -> bool:
     ## Used for submitting a proof-of-work solution.
     ##
     ## nonce: the nonce found.
@@ -389,7 +389,7 @@ proc addEthRpcs*(server: RpcServer) =
     ## Returns true if the provided solution is valid, otherwise false.
     discard
 
-  server.rpc("eth_submitHashrate") do(hashRate: UInt256, id: Uint256) -> bool:
+  server.rpc("eth_submitHashrate") do(hashRate: UInt256, id: UInt256) -> bool:
     ## Used for submitting mining hashrate.
     ##
     ## hashRate: a hexadecimal string representation (32 bytes) of the hash rate.
diff --git a/tests/private/ethtypes.nim b/tests/private/ethtypes.nim
index 303ddcc..b69dd47 100644
--- a/tests/private/ethtypes.nim
+++ b/tests/private/ethtypes.nim
@@ -122,4 +122,4 @@ type
     sent*: int                  # integer of the unix timestamp when the message was sent.
     topics*: seq[UInt256]       # list of DATA topics the message contained.
     payload*: string            # TODO: Correct type? the payload of the message.
-    workProved*: int            # integer of the work this message required before it was send (?).
\ No newline at end of file
+    workProved*: int            # integer of the work this message required before it was send (?).