diff --git a/package-lock.json b/package-lock.json
index 639afe9e..6e4f9e4d 100644
--- a/package-lock.json
+++ b/package-lock.json
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+              "dev": true,
+              "requires": {
+                "wrappy": "1.0.2"
+              }
+            },
+            "path-is-absolute": {
+              "version": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.0.tgz",
+              "integrity": "sha512-hUUTsB/vByumPhn43R+Azhsx4TQPvyQqW+XyCR6UA8ae+FGIjf5Oygj6o/FYK4ZdwnrXth2eIBKk4YlrUU0ElQ==",
+              "dev": true
+            }
           }
         },
         "js-tokens": {
@@ -5700,42 +5814,28 @@
       }
     },
     "typedoc": {
-      "version": "0.10.0",
-      "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.10.0.tgz",
-      "integrity": "sha512-+lnM/ZAv+JHfeEpGcdoE++1nsHFmfexg64gCUsQEyxzfmGJrJ2gXcaKv0dZVrxckdr9m9S6ty+OAT0Z8NICkLg==",
+      "version": "0.11.1",
+      "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.11.1.tgz",
+      "integrity": "sha512-jdNIoHm5wkZqxQTe/g9AQ3LKnZyrzHXqu6A/c9GUOeJyBWLxNr7/Dm3rwFvLksuxRNwTvY/0HRDU9sJTa9WQSg==",
       "dev": true,
       "requires": {
-        "@types/fs-extra": "5.0.0",
+        "@types/fs-extra": "5.0.1",
         "@types/handlebars": "4.0.36",
         "@types/highlight.js": "9.12.2",
-        "@types/lodash": "4.14.99",
+        "@types/lodash": "4.14.104",
         "@types/marked": "0.3.0",
         "@types/minimatch": "3.0.3",
-        "@types/shelljs": "0.7.7",
+        "@types/shelljs": "0.7.8",
         "fs-extra": "5.0.0",
         "handlebars": "4.0.10",
         "highlight.js": "9.12.0",
         "lodash": "4.17.5",
-        "marked": "0.3.16",
+        "marked": "0.3.17",
         "minimatch": "3.0.4",
         "progress": "2.0.0",
         "shelljs": "0.8.1",
         "typedoc-default-themes": "0.5.0",
-        "typescript": "2.7.1"
-      },
-      "dependencies": {
-        "@types/lodash": {
-          "version": "4.14.99",
-          "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.99.tgz",
-          "integrity": "sha512-h9uv6EUxjfDWNmJCNEoulQF/pFS4ua09LgSGjj6GgmIoyJ/MO5JsK8m9y+9CoG+8j2kDWCW+piPdR9fL7QoQYA==",
-          "dev": true
-        },
-        "typescript": {
-          "version": "2.7.1",
-          "resolved": "https://registry.npmjs.org/typescript/-/typescript-2.7.1.tgz",
-          "integrity": "sha512-bqB1yS6o9TNA9ZC/MJxM0FZzPnZdtHj0xWK/IZ5khzVqdpGul/R/EIiHRgFXlwTD7PSIaYVnGKq1QgMCu2mnqw==",
-          "dev": true
-        }
+        "typescript": "2.7.2"
       }
     },
     "typedoc-default-themes": {
diff --git a/package.json b/package.json
index d06bb0de..e1955d3b 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "jest": "jest",
     "jest-watch": "jest --watch",
-    "test": "npm-run-all clean compile:ts copy-languages-json lint jest",
+    "test": "npm-run-all clean compile:ts copy-languages-json jest",
     "dev": "tsc --watch",
     "build": "npm run compile",
     "copy-languages-json": "cp src/languages.json dist/src/languages.json",
@@ -51,6 +51,7 @@
     "@types/json-stable-stringify": "^1.0.31",
     "@types/lodash": "^4.14.104",
     "@types/node": "^9.4.6",
+    "@types/proxyquire": "^1.3.28",
     "@types/request": "^2.0.9",
     "@types/semver": "^5.5.0",
     "dedent": "^0.7.0",
@@ -58,6 +59,7 @@
     "js-yaml": "^3.10.0",
     "json-stable-stringify": "^1.0.1",
     "npm-run-all": "^4.1.2",
+    "proxyquire": "^2.0.1",
     "request": "^2.83.0",
     "rimraf": "^2.5.4",
     "semver": "^5.5.0",
@@ -71,7 +73,8 @@
   },
   "dependencies": {
     "diff": "^3.4.0",
-    "lodash": "^4.17.5"
+    "lodash": "^4.17.5",
+    "requireg": "^0.1.7"
   },
   "engines": {
     "node": ">=6.0.0"
diff --git a/src/DependencyManager/DependencyManager.ts b/src/DependencyManager/DependencyManager.ts
index 37287445..2213d6ce 100644
--- a/src/DependencyManager/DependencyManager.ts
+++ b/src/DependencyManager/DependencyManager.ts
@@ -28,7 +28,7 @@ export class DependencyManager {
     return this.lookup[name] as T;
   }
 
-  public load(): Promise<any> {
+  public load(): Promise<void[]> {
     return Promise.all(
       this.dependencies.map(dep => {
         return dep.load().then(isInstalled => {
diff --git a/test/DependencyManager/DependencyManager.spec.ts b/test/DependencyManager/DependencyManager.spec.ts
new file mode 100644
index 00000000..e82fc743
--- /dev/null
+++ b/test/DependencyManager/DependencyManager.spec.ts
@@ -0,0 +1,22 @@
+import * as proxyquire from "proxyquire";
+import {
+  DependencyOptions,
+  DependencyType,
+  DependencyManager
+} from "../../src/DependencyManager";
+
+test("should fail to find language", () => {
+  const CustomDependencyManager: typeof DependencyManager = proxyquire(
+    "../../src/DependencyManager/index.ts",
+    {}
+  ).DependencyManager;
+  const options: DependencyOptions = {
+    name: "FakeDep",
+    package: "fakedep",
+    type: DependencyType.Node
+  };
+  const manager = new CustomDependencyManager([options]);
+  expect(manager.load()).rejects.toThrowError(
+    'Dependency "FakeDep" is required and not installed.'
+  );
+});