diff --git a/testmodule/providers/jsonrpc/testJsonRpcSigner.nim b/testmodule/providers/jsonrpc/testJsonRpcSigner.nim
index e63a9a3..df2e824 100644
--- a/testmodule/providers/jsonrpc/testJsonRpcSigner.nim
+++ b/testmodule/providers/jsonrpc/testJsonRpcSigner.nim
@@ -84,24 +84,3 @@ suite "JsonRpcSigner":
     transaction.chainId = 0xdeadbeef.u256.some
     expect SignerError:
       discard await signer.populateTransaction(transaction)
-
-  test "concurrent populate calls increment nonce":
-    let signer = provider.getSigner()
-    let count = await signer.getTransactionCount(BlockTag.pending)
-    var transaction1 = Transaction.example
-    var transaction2 = Transaction.example
-    var transaction3 = Transaction.example
-
-    let populated = await allFinished(
-      signer.populateTransaction(transaction1),
-      signer.populateTransaction(transaction2),
-      signer.populateTransaction(transaction3)
-    )
-
-    transaction1 = await populated[0]
-    transaction2 = await populated[1]
-    transaction3 = await populated[2]
-
-    check !transaction1.nonce == count
-    check !transaction2.nonce == count + 1.u256
-    check !transaction3.nonce == count + 2.u256
diff --git a/testmodule/testContracts.nim b/testmodule/testContracts.nim
index ed2158a..f7ef78e 100644
--- a/testmodule/testContracts.nim
+++ b/testmodule/testContracts.nim
@@ -272,3 +272,44 @@ for url in ["ws://"  & providerUrl, "http://"  & providerUrl]:
         .confirm(1)
 
       check receipt.status == TransactionStatus.Success
+
+    test "can cancel procs that execute transactions":
+      let signer = provider.getSigner()
+      let token = TestToken.new(token.address, signer)
+      let countBefore = await signer.getTransactionCount(BlockTag.pending)
+
+      proc executeTx {.async.} =
+        discard await token.mint(accounts[0], 100.u256)
+
+      await executeTx().cancelAndWait()
+      let countAfter = await signer.getTransactionCount(BlockTag.pending)
+      check countBefore == countAfter
+
+    test "concurrent transactions succeed even if one is cancelled":
+      let signer = provider.getSigner()
+      let token = TestToken.new(token.address, signer)
+      let balanceBefore = await token.myBalance()
+
+      proc executeTx: Future[Confirmable] {.async.} =
+        return await token.mint(accounts[0], 100.u256)
+
+      proc executeTxWithCancellation: Future[Confirmable] {.async.} =
+        let fut = token.mint(accounts[0], 100.u256)
+        fut.cancelSoon()
+        return await fut
+
+      # emulate concurrent populateTransaction/sendTransaction calls, where the
+      # first one fails
+      let futs = await allFinished(
+        executeTxWithCancellation(),
+        executeTx(),
+        executeTx()
+      )
+      let receipt1 = await futs[1].confirm(0)
+      let receipt2 = await futs[2].confirm(0)
+
+      check receipt1.status == TransactionStatus.Success
+      check receipt2.status == TransactionStatus.Success
+
+      let balanceAfter = await token.myBalance()
+      check balanceAfter == balanceBefore + 200.u256
\ No newline at end of file