diff --git a/developer/js/.gitignore b/developer/js/.gitignore
index b947077876..bbbfd24cf5 100644
--- a/developer/js/.gitignore
+++ b/developer/js/.gitignore
@@ -1,2 +1,5 @@
 node_modules/
 dist/
+dist-tests/
+tsconfig.tsbuildinfo
+tests/tsconfig.tsbuildinfo
diff --git a/developer/js/build.sh b/developer/js/build.sh
index 4182fd6088..4b9747a99a 100755
--- a/developer/js/build.sh
+++ b/developer/js/build.sh
@@ -94,6 +94,8 @@ type npm >/dev/null ||\
 
 if (( install_dependencies )) ; then
   verify_npm_setup
+  # We need to build web-environment with a script for now
+  "$KEYMAN_ROOT/resources/web-environment/build.sh" || fail "Could not build web-environment"
 fi
 
 build || fail "Compilation failed."
diff --git a/developer/js/package.json b/developer/js/package.json
index bfde9a39d3..91b2583b72 100644
--- a/developer/js/package.json
+++ b/developer/js/package.json
@@ -10,7 +10,7 @@
   ],
   "scripts": {
     "build": "tsc -b",
-    "test": "mocha",
+    "test": "cd tests && tsc -b && cd .. && mocha",
     "prepublishOnly": "npm run build"
   },
   "repository": {
@@ -56,7 +56,6 @@
     "ts-node": "^9.1.1"
   },
   "mocha": {
-    "require": "ts-node/register",
-    "spec": "tests/**/test-*.ts"
+    "spec": "dist-tests/**/test-*.js"
   }
 }
diff --git a/developer/js/source/lexical-model-compiler/model-definitions.ts b/developer/js/source/lexical-model-compiler/model-definitions.ts
index 25f1bc1ad2..8ac75267f8 100644
--- a/developer/js/source/lexical-model-compiler/model-definitions.ts
+++ b/developer/js/source/lexical-model-compiler/model-definitions.ts
@@ -3,6 +3,8 @@ import { defaultApplyCasing,
          defaultSearchTermToKey
        } from "./model-defaults";
 
+const KEYMAN_VERSION = require("@keymanapp/keyman-version");
+
 /**
  * Processes certain defined model behaviors in such a way that the needed closures
  * may be safely compiled to a JS file and loaded within the LMLayer.
diff --git a/developer/js/tests/helpers/index.ts b/developer/js/tests/helpers/index.ts
index 3719548037..e8039d00be 100644
--- a/developer/js/tests/helpers/index.ts
+++ b/developer/js/tests/helpers/index.ts
@@ -1,4 +1,4 @@
-/// <reference path="../../node_modules/@keymanapp/models-types/index.d.ts" />
+/// <reference path="../../../../common/web/lm-message-types/message.d.ts" />
 
 /**
  * Helpers and utilities for the Mocha tests.
@@ -16,14 +16,14 @@ export interface CompilationResult {
 
 /**
  * Builds a path to the fixture with the given path components.
- * 
+ *
  * e.g., makePathToFixture('example.qaa.trivial')
  * e.g., makePathToFixture('example.qaa.trivial', 'model.ts')
- * 
+ *
  * @param components One or more path components.
  */
 export function makePathToFixture(...components: string[]): string {
-  return path.join(__dirname, '..', 'fixtures', ...components);
+  return path.join(__dirname, '..', '..', 'tests', 'fixtures', ...components);
 }
 
 /**
@@ -132,7 +132,7 @@ export class LogHoarder {
   clear() {
     this.messages = [];
   }
-  
+
   /**
    * Hoards a log message for later perusal.
    */
@@ -159,7 +159,7 @@ export class LogHoarder {
   /**
    * Overrides the global log handler, allowing one to browse log messages
    * later.
-   * 
+   *
    * Remember to uninstall the log handler afterwards!
    */
   install(): this {
@@ -169,7 +169,7 @@ export class LogHoarder {
 
   /**
    * Return the log message handler to its default.
-   * 
+   *
    * Note: You MUST uninstall the hoarder after use!
    * It's recommended you put this in an afterEach() callback.
    */
diff --git a/developer/js/tests/test-compile-model-with-pseudoclosure.ts b/developer/js/tests/test-compile-model-with-pseudoclosure.ts
index baba6059c9..391cbbae37 100644
--- a/developer/js/tests/test-compile-model-with-pseudoclosure.ts
+++ b/developer/js/tests/test-compile-model-with-pseudoclosure.ts
@@ -2,12 +2,12 @@ import LexicalModelCompiler from '../dist/lexical-model-compiler/lexical-model-c
 import {assert} from 'chai';
 import 'mocha';
 
-import path = require('path');
 import { compileModelSourceCode } from './helpers';
+import { makePathToFixture } from './helpers';
 
 describe('LexicalModelCompiler - pseudoclosure compilation + use', function () {
   const MODEL_ID = 'example.qaa.trivial';
-  const PATH = path.join(__dirname, 'fixtures', MODEL_ID);
+  const PATH = makePathToFixture(MODEL_ID);
 
   describe('specifying custom methods: applyCasing and searchTermToKey', function () {
     let casingWithPrependedSymbols: CasingFunction = function(casingName: CasingForm, text: string, defaultApplyCasing: CasingFunction) {
diff --git a/developer/js/tests/test-join-word-breaker.ts b/developer/js/tests/test-join-word-breaker.ts
index c46c4a2d6a..a999c8a93c 100644
--- a/developer/js/tests/test-join-word-breaker.ts
+++ b/developer/js/tests/test-join-word-breaker.ts
@@ -1,6 +1,6 @@
 var assert = require('chai').assert;
 
-const defaultWordBreaker = require('@keymanapp/models-wordbreakers').wordBreakers['default'];
+const defaultWordBreaker = require('../../../common/models/wordbreakers/build').wordBreakers['default'];
 import {decorateWithJoin} from '../dist/lexical-model-compiler/join-word-breaker-decorator';
 
 
diff --git a/developer/js/tests/test-override-script-defaults.ts b/developer/js/tests/test-override-script-defaults.ts
index 42d58a064b..7f70eed8a5 100644
--- a/developer/js/tests/test-override-script-defaults.ts
+++ b/developer/js/tests/test-override-script-defaults.ts
@@ -1,6 +1,6 @@
 var assert = require('chai').assert;
 
-const defaultWordBreaker = require('@keymanapp/models-wordbreakers').wordBreakers['default'];
+const defaultWordBreaker = require('../../../common/models/wordbreakers/build').wordBreakers['default'];
 import {decorateWithScriptOverrides} from '../dist/lexical-model-compiler/script-overrides-decorator';
 
 const THIN_SPACE = "\u2009";
diff --git a/developer/js/tests/test-punctuation.ts b/developer/js/tests/test-punctuation.ts
index 2c8fa9dec8..925a01bd8e 100644
--- a/developer/js/tests/test-punctuation.ts
+++ b/developer/js/tests/test-punctuation.ts
@@ -2,14 +2,14 @@ import LexicalModelCompiler from '../dist/lexical-model-compiler/lexical-model-c
 import {assert} from 'chai';
 import 'mocha';
 
-import path = require('path');
 import { compileModelSourceCode } from './helpers';
+import { makePathToFixture } from './helpers';
 
 
 describe('LexicalModelCompiler', function () {
   describe('specifying punctuation', function () {
     const MODEL_ID = 'example.qaa.trivial';
-    const PATH = path.join(__dirname, 'fixtures', MODEL_ID)
+    const PATH = makePathToFixture(MODEL_ID);
 
     it('should compile punctuation into the generated code', function () {
       let compiler = new LexicalModelCompiler;
diff --git a/developer/js/tests/tsconfig.json b/developer/js/tests/tsconfig.json
index 655a3fcfe1..9ce358c7f1 100644
--- a/developer/js/tests/tsconfig.json
+++ b/developer/js/tests/tsconfig.json
@@ -1,10 +1,23 @@
 {
+    "extends": "../../../tsconfig-base.json",
+
     "compilerOptions": {
         "module": "commonjs",
+        "moduleResolution": "node",
         "noImplicitAny": true,
-        "sourceMap": true
+        "sourceMap": true,
+        "rootDir": "./",
+        "outDir": "../dist-tests/"
     },
     "include": [
-        "**/test-*.ts"
-    ]
+        "**/test-*.ts",
+        "helpers/index.ts"
+    ],
+    "references": [
+        { "path": "../../../common/web/keyman-version" },
+        { "path": "../../../common/models/types" },
+        { "path": "../../../common/models/templates" },
+        { "path": "../../../common/models/wordbreakers" },
+        { "path": "../"}
+      ]
 }
\ No newline at end of file
diff --git a/developer/js/tsconfig.json b/developer/js/tsconfig.json
index ba335fcc7d..741f3c893f 100644
--- a/developer/js/tsconfig.json
+++ b/developer/js/tsconfig.json
@@ -2,11 +2,12 @@
   "extends": "../../tsconfig-base.json",
 
   "compilerOptions": {
-    //"module": "commonjs",
+    "module": "commonjs",
     "target": "es2017",
     "moduleResolution": "node",
     "sourceMap": true,
     "outDir": "dist/",
+    "rootDir": "source/",
     "declaration": true,
     "alwaysStrict": true,
     "noImplicitThis": true,