diff --git a/lib/tests/test.js b/lib/tests/test.js
index f1669cd8..9345f8f7 100644
--- a/lib/tests/test.js
+++ b/lib/tests/test.js
@@ -112,28 +112,26 @@ class Test {
     // 3) Once we get the receipt back, we dispatch the real call and pass the original callback;
     //
     // This will still allow tests to get the return value from the call and run contracts unmodified.
-    simProvider.realSendAsync = simProvider.sendAsync;
+    simProvider.realSendAsync = simProvider.sendAsync.bind(simProvider);
     simProvider.sendAsync = function(payload, cb) {
       if(payload.method !== 'eth_call') {
-        return simProvider.realSendAsync.apply(simProvider.realSendAsync, [payload, cb]);
+        return simProvider.realSendAsync(payload, cb);
       }
 
       let newParams = Object.assign({}, payload.params[0], {gasPrice: '0x77359400'});
       let newPayload = {
-          id: parseInt(Math.random(1000000) * 1000000, 10),
+          id: payload.id + 1,
           method: 'eth_sendTransaction',
           params: [newParams],
           jsonrpc: payload.jsonrpc
       };
 
-      let txCallback = (_err, response) => {
+      simProvider.realSendAsync(newPayload, (_err, response) => {
         let txHash = response.result;
         self.web3.eth.getTransactionReceipt(txHash, (_err, _res) => {
-          simProvider.realSendAsync.apply(simProvider.realSendAsync, [payload, cb]);
+          simProvider.realSendAsync(payload, cb);
         });
-      };
-
-      simProvider.realSendAsync.apply(simProvider.realSendAsync, [newPayload, txCallback]);
+      });
     };
 
     this.web3.setProvider(simProvider);