diff --git a/lib/contracts/contracts.js b/lib/contracts/contracts.js
index b09945b6..5c389723 100644
--- a/lib/contracts/contracts.js
+++ b/lib/contracts/contracts.js
@@ -59,6 +59,10 @@ class ContractsManager {
     let self = this;
     async.waterfall([
       function compileContracts(callback) {
+        if (process.env.isTest && self.compiledContracts && Object.keys(self.compiledContracts).length) {
+          // Only compile once for tests
+          return callback();
+        }
         self.events.request("compiler:contracts", self.contractFiles, function (err, compiledObject) {
           self.compiledContracts = compiledObject;
           callback(err);
diff --git a/lib/tests/test.js b/lib/tests/test.js
index 61b67f2e..a935327f 100644
--- a/lib/tests/test.js
+++ b/lib/tests/test.js
@@ -33,6 +33,7 @@ class Test {
     this.events = new Events();
     this.ready = true;
     this.builtContracts = {};
+    this.compiledContracts = {};
 
     this.web3 = new Web3();
     if (this.simOptions.node) {
@@ -72,6 +73,7 @@ class Test {
     const self = this;
     this.engine.contractsManager.build(() => {
       self.builtContracts = cloneDeep(self.engine.contractsManager.contracts);
+      self.compiledContracts = cloneDeep(self.engine.contractsManager.compiledContracts);
       callback();
     });
   }
@@ -99,6 +101,7 @@ class Test {
 
     // Reset contracts
     this.engine.contractsManager.contracts = cloneDeep(this.builtContracts);
+    this.engine.contractsManager.compiledContracts = cloneDeep(this.compiledContracts);
 
     this._deploy(options, (err, accounts) => {
       this.ready = true;
diff --git a/package-lock.json b/package-lock.json
index 89074a3a..4455492f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12792,7 +12792,7 @@
     "webpack": {
       "version": "3.11.0",
       "resolved": "https://registry.npmjs.org/webpack/-/webpack-3.11.0.tgz",
-      "integrity": "sha512-3kOFejWqj5ISpJk4Qj/V7w98h9Vl52wak3CLiw/cDOfbVTq7FeoZ0SdoHHY9PYlHr50ZS42OfvzE2vB4nncKQg==",
+      "integrity": "sha1-d9pFGx17SxF62vQaGpO1dC8k2JQ=",
       "requires": {
         "acorn": "5.5.3",
         "acorn-dynamic-import": "2.0.2",
@@ -12818,10 +12818,50 @@
         "yargs": "8.0.2"
       },
       "dependencies": {
+        "camelcase": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
+        },
+        "cliui": {
+          "version": "3.2.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
+          "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
+          "requires": {
+            "string-width": "1.0.2",
+            "strip-ansi": "3.0.1",
+            "wrap-ansi": "2.1.0"
+          },
+          "dependencies": {
+            "string-width": {
+              "version": "1.0.2",
+              "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+              "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+              "requires": {
+                "code-point-at": "1.1.0",
+                "is-fullwidth-code-point": "1.0.0",
+                "strip-ansi": "3.0.1"
+              }
+            },
+            "strip-ansi": {
+              "version": "3.0.1",
+              "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+              "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+              "requires": {
+                "ansi-regex": "2.1.1"
+              }
+            }
+          }
+        },
         "has-flag": {
           "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz",
-          "integrity": "sha1-6CB68cx7MNRGzHC3NLXovhj4jVE="
+          "resolved": "https://registry.npmjs.org/prepend-http/-/prepend-http-2.0.0.tgz",
+          "integrity": "sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc="
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8="
         },
         "supports-color": {
           "version": "4.5.0",
@@ -12830,6 +12870,54 @@
           "requires": {
             "has-flag": "2.0.0"
           }
+        },
+        "tapable": {
+          "version": "0.2.8",
+          "resolved": "https://registry.npmjs.org/tapable/-/tapable-0.2.8.tgz",
+          "integrity": "sha1-mTcqXJmb8t8WCvwNdL7U9HlIzSI="
+        },
+        "url-parse-lax": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
+          "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww="
+        },
+        "yargs": {
+          "version": "8.0.2",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-8.0.2.tgz",
+          "integrity": "sha1-YpmpBVsc78lp/355wdkY3Osiw2A=",
+          "requires": {
+            "camelcase": "4.1.0",
+            "cliui": "3.2.0",
+            "decamelize": "1.2.0",
+            "get-caller-file": "1.0.2",
+            "os-locale": "2.1.0",
+            "read-pkg-up": "2.0.0",
+            "require-directory": "2.1.1",
+            "require-main-filename": "1.0.1",
+            "set-blocking": "2.0.0",
+            "string-width": "2.1.1",
+            "which-module": "2.0.0",
+            "y18n": "3.2.1",
+            "yargs-parser": "7.0.0"
+          },
+          "dependencies": {
+            "yargs-parser": {
+              "version": "7.0.0",
+              "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-7.0.0.tgz",
+              "integrity": "sha1-jQrELxbqVd69MyyvTEA4s+P139k=",
+              "requires": {
+                "camelcase": "4.1.0"
+              }
+            }
+          }
+        },
+        "yargs-parser": {
+          "version": "9.0.2",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-9.0.2.tgz",
+          "integrity": "sha1-nM9qQ0YP5O1Aqbto9I1DuKaMwHc=",
+          "requires": {
+            "camelcase": "4.1.0"
+          }
         }
       }
     },
@@ -12932,10 +13020,8 @@
         "p-each-series": "1.0.0",
         "p-lazy": "1.0.0",
         "prettier": "1.13.4",
-        "supports-color": "5.4.0",
         "v8-compile-cache": "2.0.0",
         "webpack-addons": "1.1.5",
-        "yargs": "11.1.0",
         "yeoman-environment": "2.2.0",
         "yeoman-generator": "2.0.5"
       },
@@ -12964,8 +13050,7 @@
           "integrity": "sha512-ObN6h1v2fTJSmUXoS3nMQ92LbDK9be4TV+6G+omQlGJFdcUX5heKi1LZ1YnRMIgwTLEj3E24bT6tYni50rlCfQ==",
           "requires": {
             "ansi-styles": "3.2.1",
-            "escape-string-regexp": "1.0.5",
-            "supports-color": "5.4.0"
+            "escape-string-regexp": "1.0.5"
           }
         },
         "cliui": {
@@ -12974,7 +13059,6 @@
           "integrity": "sha512-4FG+RSG9DL7uEwRUZXZn3SS34DiDPfzP0VOiEwtUWlE+AR2EIg+hSyvrIgUUfhdgR/UkAeW2QHgeP+hWrXs7jQ==",
           "requires": {
             "string-width": "2.1.1",
-            "strip-ansi": "4.0.0",
             "wrap-ansi": "2.1.0"
           }
         },
@@ -13001,8 +13085,7 @@
           "integrity": "sha512-jox/62b2GofV1qTUQTMPEJSDIGycS43evqYzD/KVtEb9OCoki9cnacUPxCrZa7JfPzZSYOCZhu9O9luaMxAX8g==",
           "requires": {
             "graceful-fs": "4.1.11",
-            "memory-fs": "0.4.1",
-            "tapable": "1.0.0"
+            "memory-fs": "0.4.1"
           }
         },
         "got": {
@@ -13025,7 +13108,6 @@
             "pify": "3.0.0",
             "safe-buffer": "5.1.1",
             "timed-out": "4.0.1",
-            "url-parse-lax": "3.0.0",
             "url-to-options": "1.0.1"
           }
         },
@@ -13050,7 +13132,6 @@
             "run-async": "2.3.0",
             "rxjs": "5.5.11",
             "string-width": "2.1.1",
-            "strip-ansi": "4.0.0",
             "through": "2.3.8"
           }
         },
@@ -13079,101 +13160,6 @@
         }
       }
     },
-    "webcrypto-shim": {
-      "version": "github:dignifiedquire/webcrypto-shim#190bc9ec341375df6025b17ae12ddb2428ea49c8"
-    },
-    "webpack": {
-      "version": "3.11.0",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-3.11.0.tgz",
-      "integrity": "sha512-3kOFejWqj5ISpJk4Qj/V7w98h9Vl52wak3CLiw/cDOfbVTq7FeoZ0SdoHHY9PYlHr50ZS42OfvzE2vB4nncKQg==",
-      "requires": {
-        "acorn": "5.5.3",
-        "acorn-dynamic-import": "2.0.2",
-        "ajv": "6.2.1",
-        "ajv-keywords": "3.1.0",
-        "async": "2.6.0",
-        "enhanced-resolve": "3.4.1",
-        "escope": "3.6.0",
-        "interpret": "1.1.0",
-        "json-loader": "0.5.7",
-        "json5": "0.5.1",
-        "loader-runner": "2.3.0",
-        "loader-utils": "1.1.0",
-        "memory-fs": "0.4.1",
-        "mkdirp": "0.5.1",
-        "node-libs-browser": "2.1.0",
-        "source-map": "0.5.7",
-        "supports-color": "4.5.0",
-        "tapable": "0.2.8",
-        "uglifyjs-webpack-plugin": "0.4.6",
-        "watchpack": "1.6.0",
-        "webpack-sources": "1.1.0",
-        "yargs": "8.0.2"
-      },
-      "dependencies": {
-        "has-flag": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/prepend-http/-/prepend-http-2.0.0.tgz",
-          "integrity": "sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc="
-        },
-        "strip-ansi": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
-          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
-          "requires": {
-            "ansi-regex": "3.0.0"
-          }
-        },
-        "supports-color": {
-          "version": "5.4.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.4.0.tgz",
-          "integrity": "sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==",
-          "requires": {
-            "has-flag": "3.0.0"
-          }
-        },
-        "tapable": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/tapable/-/tapable-1.0.0.tgz",
-          "integrity": "sha512-dQRhbNQkRnaqauC7WqSJ21EEksgT0fYZX2lqXzGkpo8JNig9zGZTYoMGvyI2nWmXlE2VSVXVDu7wLVGu/mQEsg=="
-        },
-        "url-parse-lax": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
-          "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
-          "requires": {
-            "prepend-http": "2.0.0"
-          }
-        },
-        "yargs": {
-          "version": "11.1.0",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-11.1.0.tgz",
-          "integrity": "sha512-NwW69J42EsCSanF8kyn5upxvjp5ds+t3+udGBeTbFnERA+lF541DDpMawzo4z6W/QrzNM18D+BPMiOBibnFV5A==",
-          "requires": {
-            "cliui": "4.1.0",
-            "decamelize": "1.2.0",
-            "find-up": "2.1.0",
-            "get-caller-file": "1.0.2",
-            "os-locale": "2.1.0",
-            "require-directory": "2.1.1",
-            "require-main-filename": "1.0.1",
-            "set-blocking": "2.0.0",
-            "string-width": "2.1.1",
-            "which-module": "2.0.0",
-            "y18n": "3.2.1",
-            "yargs-parser": "9.0.2"
-          }
-        },
-        "yargs-parser": {
-          "version": "9.0.2",
-          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-9.0.2.tgz",
-          "integrity": "sha1-nM9qQ0YP5O1Aqbto9I1DuKaMwHc=",
-          "requires": {
-            "camelcase": "4.1.0"
-          }
-        }
-      }
-    },
     "webpack-core": {
       "version": "0.6.9",
       "resolved": "https://registry.npmjs.org/webpack-core/-/webpack-core-0.6.9.tgz",
@@ -13458,70 +13444,6 @@
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
     },
-    "yargs": {
-      "version": "8.0.2",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-8.0.2.tgz",
-      "integrity": "sha1-YpmpBVsc78lp/355wdkY3Osiw2A=",
-      "requires": {
-        "camelcase": "4.1.0",
-        "cliui": "3.2.0",
-        "decamelize": "1.2.0",
-        "get-caller-file": "1.0.2",
-        "os-locale": "2.1.0",
-        "read-pkg-up": "2.0.0",
-        "require-directory": "2.1.1",
-        "require-main-filename": "1.0.1",
-        "set-blocking": "2.0.0",
-        "string-width": "2.1.1",
-        "which-module": "2.0.0",
-        "y18n": "3.2.1",
-        "yargs-parser": "7.0.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
-        },
-        "cliui": {
-          "version": "3.2.0",
-          "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
-          "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
-          "requires": {
-            "string-width": "1.0.2",
-            "strip-ansi": "3.0.1",
-            "wrap-ansi": "2.1.0"
-          },
-          "dependencies": {
-            "string-width": {
-              "version": "1.0.2",
-              "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-              "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
-              "requires": {
-                "code-point-at": "1.1.0",
-                "is-fullwidth-code-point": "1.0.0",
-                "strip-ansi": "3.0.1"
-              }
-            }
-          }
-        }
-      }
-    },
-    "yargs-parser": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-7.0.0.tgz",
-      "integrity": "sha1-jQrELxbqVd69MyyvTEA4s+P139k=",
-      "requires": {
-        "camelcase": "4.1.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
-        }
-      }
-    },
     "yauzl": {
       "version": "2.9.1",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.9.1.tgz",
diff --git a/test_apps/test_app/package-lock.json b/test_apps/test_app/package-lock.json
index 3dba6607..6a0c2c66 100644
--- a/test_apps/test_app/package-lock.json
+++ b/test_apps/test_app/package-lock.json
@@ -89,7 +89,7 @@
     "dom-helpers": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/dom-helpers/-/dom-helpers-3.3.1.tgz",
-      "integrity": "sha512-2Sm+JaYn74OiTM2wHvxJOo3roiq/h25Yi69Fqk269cNUwIXsCvATB6CRSFC9Am/20G2b28hGv/+7NiWydIrPvg=="
+      "integrity": "sha1-/BpOFf/fYN3eA6SAqcD+zoId1KY="
     },
     "dotenv": {
       "version": "4.0.0",
@@ -229,7 +229,7 @@
     "node-fetch": {
       "version": "1.7.3",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.3.tgz",
-      "integrity": "sha512-NhZ4CsKx7cYm2vSrBAr2PvFOe6sWDf0UYLRqA6svUYg7+/TSfVAu49jYC4BvQ4Sms9SZgdqGBgroqfDhJdTyKQ==",
+      "integrity": "sha1-mA9vcthSEaU0fGsrwYxbhMPrR+8=",
       "requires": {
         "encoding": "0.1.12",
         "is-stream": "1.1.0"
@@ -252,7 +252,7 @@
     "promise": {
       "version": "7.3.1",
       "resolved": "https://registry.npmjs.org/promise/-/promise-7.3.1.tgz",
-      "integrity": "sha512-nolQXZ/4L+bP/UGlkfaIujX9BKxGwmQ9OT4mOt5yvy8iK1h3wqTEJCijzGANTCCl9nWjY41juyAn2K3Q1hLLTg==",
+      "integrity": "sha1-BktyYCsY+Q8pGSuLG8QY/9Hr078=",
       "requires": {
         "asap": "2.0.6"
       }
@@ -289,7 +289,7 @@
     "react-bootstrap": {
       "version": "0.32.1",
       "resolved": "https://registry.npmjs.org/react-bootstrap/-/react-bootstrap-0.32.1.tgz",
-      "integrity": "sha512-RbfzKUbsukWsToWqGHfCCyMFq9QQI0TznutdyxyJw6dih2NvIne25Mrssg8LZsprqtPpyQi8bN0L0Fx3fUsL8Q==",
+      "integrity": "sha1-YGJMG0ijnXc+9szmQhpPM+zBZrs=",
       "requires": {
         "babel-runtime": "6.26.0",
         "classnames": "2.2.5",
@@ -319,7 +319,7 @@
     "react-overlays": {
       "version": "0.8.3",
       "resolved": "https://registry.npmjs.org/react-overlays/-/react-overlays-0.8.3.tgz",
-      "integrity": "sha512-h6GT3jgy90PgctleP39Yu3eK1v9vaJAW73GOA/UbN9dJ7aAN4BTZD6793eI1D5U+ukMk17qiqN/wl3diK1Z5LA==",
+      "integrity": "sha1-+tZe6lskMBzKGSoWn13dsLINOsU=",
       "requires": {
         "classnames": "2.2.5",
         "dom-helpers": "3.3.1",
@@ -353,7 +353,7 @@
     "regenerator-runtime": {
       "version": "0.11.1",
       "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
-      "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg=="
+      "integrity": "sha1-vgWtf5v30i4Fb5cmzuUBf78Z4uk="
     },
     "setimmediate": {
       "version": "1.0.5",
@@ -412,7 +412,7 @@
     "zeppelin-solidity": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/zeppelin-solidity/-/zeppelin-solidity-1.8.0.tgz",
-      "integrity": "sha512-7Mxq6Y7EES0PSLrRF6v0EVYqBVRRo8hFrr7m3jEs69VbbQ5kpANzizeEdbP1/PWKSOmBOg208qP2vSA0FlzFLA==",
+      "integrity": "sha1-BJ/N59rqn8hSEPjG25+M0auKhTo=",
       "requires": {
         "dotenv": "4.0.0",
         "ethjs-abi": "0.2.1"