diff --git a/lib/tests/test.js b/lib/tests/test.js
index 5269d84bb..43143798b 100644
--- a/lib/tests/test.js
+++ b/lib/tests/test.js
@@ -32,6 +32,7 @@ class Test {
     this.contracts = {};
     this.events = new Events();
     this.ready = true;
+    this.builtContracts = {};
 
     this.web3 = new Web3();
     if (this.simOptions.node) {
@@ -52,6 +53,10 @@ class Test {
       logger: new TestLogger({logLevel: 'debug'})
     });
 
+    this.versions_default = this.engine.config.contractsConfig.versions;
+    // Reset contract config to nothing to make sure we deploy only what we want
+    this.engine.config.contractsConfig = {contracts: {}, versions: this.versions_default};
+
     this.engine.startService("libraryManager");
     this.engine.startService("codeRunner");
     this.engine.startService("web3", {
@@ -109,8 +114,7 @@ class Test {
     const self = this;
     async.waterfall([
       function getConfig(next) {
-        let _versions_default = self.engine.config.contractsConfig.versions;
-        self.engine.config.contractsConfig = {contracts: config.contracts, versions: _versions_default};
+        self.engine.config.contractsConfig = {contracts: config.contracts, versions: self.versions_default};
         self.engine.events.emit(constants.events.contractConfigChanged, self.engine.config.contractsConfig);
         next();
       },