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diff --git a/devtools/client/debugger/src/utils/test-head.js b/devtools/client/debugger/src/utils/test-head.js
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+++ b/devtools/client/debugger/src/utils/test-head.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+/**
+ * Utils for Jest
+ * @module utils/test-head
+ */
+
+import { combineReducers } from "redux";
+import reducers from "../reducers";
+import actions from "../actions";
+import * as selectors from "../selectors";
+import {
+  searchWorker,
+  prettyPrintWorker,
+  parserWorker,
+} from "../test/tests-setup";
+import configureStore from "../actions/utils/create-store";
+import sourceQueue from "../utils/source-queue";
+import { setupCreate } from "../client/firefox/create";
+import { createLocation } from "./location";
+
+// Import the internal module used by the source-map worker
+// as node doesn't have Web Worker support and require path mapping
+// doesn't work from nodejs worker thread and break mappings to devtools/ folder.
+import sourceMapLoader from "devtools/client/shared/source-map-loader/source-map";
+
+/**
+ * This file contains older interfaces used by tests that have not been
+ * converted to use test-mockup.js
+ */
+
+/**
+ * @memberof utils/test-head
+ * @static
+ */
+function createStore(client, initialState = {}, sourceMapLoaderMock) {
+  const store = configureStore({
+    log: false,
+    makeThunkArgs: args => {
+      return {
+        ...args,
+        client,
+        sourceMapLoader:
+          sourceMapLoaderMock !== undefined
+            ? sourceMapLoaderMock
+            : sourceMapLoader,
+        parserWorker,
+        prettyPrintWorker,
+        searchWorker,
+      };
+    },
+  })(combineReducers(reducers), initialState);
+  sourceQueue.clear();
+  sourceQueue.initialize({
+    newOriginalSources: sources =>
+      store.dispatch(actions.newOriginalSources(sources)),
+  });
+
+  store.thunkArgs = () => ({
+    dispatch: store.dispatch,
+    getState: store.getState,
+    client,
+    sourceMapLoader,
+    panel: {},
+  });
+
+  // Put the initial context in the store, for convenience to unit tests.
+  store.cx = selectors.getThreadContext(store.getState());
+
+  setupCreate({ store });
+
+  return store;
+}
+
+/**
+ * @memberof utils/test-head
+ * @static
+ */
+function commonLog(msg, data = {}) {
+  console.log(`[INFO] ${msg} ${JSON.stringify(data)}`);
+}
+
+function makeFrame({ id, sourceId, thread }, opts = {}) {
+  const source = createSourceObject(sourceId);
+  const sourceActor = {
+    id: `${sourceId}-actor`,
+    actor: `${sourceId}-actor`,
+    source: sourceId,
+    sourceObject: source,
+  };
+  return {
+    id,
+    scope: { bindings: { variables: {}, arguments: [] } },
+    location: createLocation({ source, sourceActor, line: 4 }),
+    thread: thread || "FakeThread",
+    ...opts,
+  };
+}
+
+function createSourceObject(filename, props = {}) {
+  return {
+    id: filename,
+    url: makeSourceURL(filename),
+    isPrettyPrinted: false,
+    isExtension: false,
+    isOriginal: filename.includes("originalSource"),
+  };
+}
+
+function createOriginalSourceObject(generated) {
+  const rv = {
+    ...generated,
+    id: `${generated.id}/originalSource`,
+  };
+
+  return rv;
+}
+
+function makeSourceURL(filename) {
+  return `http://localhost:8000/examples/${filename}`;
+}
+
+function createMakeSource() {
+  const indicies = {};
+
+  return function (name, props = {}) {
+    const index = (indicies[name] | 0) + 1;
+    indicies[name] = index;
+
+    // Mock a SOURCE Resource, which happens to be the SourceActor's form
+    // with resourceType and targetFront additional attributes
+    return {
+      resourceType: "source",
+      // Mock the targetFront to support makeSourceId function
+      targetFront: {
+        isDestroyed() {
+          return false;
+        },
+        getCachedFront(typeName) {
+          return typeName == "thread" ? { actorID: "FakeThread" } : null;
+        },
+      },
+      // Allow to use custom ID's for reducer source objects
+      mockedJestID: name,
+      actor: `${name}-${index}-actor`,
+      url: `http://localhost:8000/examples/${name}`,
+      sourceMapBaseURL: props.sourceMapBaseURL || null,
+      sourceMapURL: props.sourceMapURL || null,
+      introductionType: props.introductionType || null,
+      extensionName: null,
+    };
+  };
+}
+
+/**
+ * @memberof utils/test-head
+ * @static
+ */
+let creator;
+beforeEach(() => {
+  creator = createMakeSource();
+});
+afterEach(() => {
+  creator = null;
+});
+function makeSource(name, props) {
+  if (!creator) {
+    throw new Error("makeSource() cannot be called outside of a test");
+  }
+
+  return creator(name, props);
+}
+
+function makeOriginalSource(source) {
+  return {
+    id: `${source.id}/originalSource`,
+    url: `${source.url}-original`,
+    sourceActor: {
+      thread: "FakeThread",
+    },
+  };
+}
+
+function makeFuncLocation(startLine, endLine) {
+  if (!endLine) {
+    endLine = startLine + 1;
+  }
+  return {
+    start: {
+      line: startLine,
+    },
+    end: {
+      line: endLine,
+    },
+  };
+}
+
+function makeSymbolDeclaration(name, start, end, klass) {
+  return {
+    id: `${name}:${start}`,
+    name,
+    location: makeFuncLocation(start, end),
+    klass,
+  };
+}
+
+/**
+ * @memberof utils/test-head
+ * @static
+ */
+function waitForState(store, predicate) {
+  return new Promise(resolve => {
+    let ret = predicate(store.getState());
+    if (ret) {
+      resolve(ret);
+    }
+
+    const unsubscribe = store.subscribe(() => {
+      ret = predicate(store.getState());
+      if (ret) {
+        unsubscribe();
+        // NOTE: memoizableAction adds an additional tick for validating context
+        setTimeout(() => resolve(ret));
+      }
+    });
+  });
+}
+
+function watchForState(store, predicate) {
+  let sawState = false;
+  const checkState = function () {
+    if (!sawState && predicate(store.getState())) {
+      sawState = true;
+    }
+    return sawState;
+  };
+
+  let unsubscribe;
+  if (!checkState()) {
+    unsubscribe = store.subscribe(() => {
+      if (checkState()) {
+        unsubscribe();
+      }
+    });
+  }
+
+  return function read() {
+    if (unsubscribe) {
+      unsubscribe();
+    }
+
+    return sawState;
+  };
+}
+
+function getTelemetryEvents(eventName) {
+  return window.dbg._telemetry.events[eventName] || [];
+}
+
+function waitATick(callback) {
+  return new Promise(resolve => {
+    setTimeout(() => {
+      callback();
+      resolve();
+    });
+  });
+}
+
+export {
+  actions,
+  selectors,
+  reducers,
+  createStore,
+  commonLog,
+  getTelemetryEvents,
+  makeFrame,
+  createSourceObject,
+  createOriginalSourceObject,
+  createMakeSource,
+  makeSourceURL,
+  makeSource,
+  makeOriginalSource,
+  makeSymbolDeclaration,
+  waitForState,
+  watchForState,
+  waitATick,
+};