diff --git a/devtools/client/aboutdebugging/test/addons/unpacked/bootstrap.js b/devtools/client/aboutdebugging/test/addons/unpacked/bootstrap.js
index 396e829f780f..d96e31e5e894 100644
--- a/devtools/client/aboutdebugging/test/addons/unpacked/bootstrap.js
+++ b/devtools/client/aboutdebugging/test/addons/unpacked/bootstrap.js
@@ -7,6 +7,13 @@
 "use strict";
 
 Components.utils.import("resource://gre/modules/Services.jsm");
+
+// This function is called from the webconsole test:
+// browser_addons_debug_bootstrapped.js
+function myBootstrapAddonFunction() { // eslint-disable-line no-unused-vars
+  Services.obs.notifyObservers(null, "addon-console-works", null);
+}
+
 function startup() {
   Services.obs.notifyObservers(null, "test-devtools", null);
 }
diff --git a/devtools/client/aboutdebugging/test/browser.ini b/devtools/client/aboutdebugging/test/browser.ini
index 04efc1383562..c32acb29eaca 100644
--- a/devtools/client/aboutdebugging/test/browser.ini
+++ b/devtools/client/aboutdebugging/test/browser.ini
@@ -11,6 +11,7 @@ support-files =
   service-workers/push-sw.html
   service-workers/push-sw.js
 
+[browser_addons_debug_bootstrapped.js]
 [browser_addons_debugging_initial_state.js]
 [browser_addons_install.js]
 [browser_addons_toggle_debug.js]
diff --git a/devtools/client/aboutdebugging/test/browser_addons_debug_bootstrapped.js b/devtools/client/aboutdebugging/test/browser_addons_debug_bootstrapped.js
new file mode 100644
index 000000000000..99a775e5aabf
--- /dev/null
+++ b/devtools/client/aboutdebugging/test/browser_addons_debug_bootstrapped.js
@@ -0,0 +1,76 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+const ADDON_ID = "test-devtools@mozilla.org";
+const ADDON_NAME = "test-devtools";
+
+const { BrowserToolboxProcess } = Cu.import("resource://devtools/client/framework/ToolboxProcess.jsm", {});
+
+add_task(function* () {
+  yield new Promise(resolve => {
+    let options = {"set": [
+      // Force enabling of addons debugging
+      ["devtools.chrome.enabled", true],
+      ["devtools.debugger.remote-enabled", true],
+      // Disable security prompt
+      ["devtools.debugger.prompt-connection", false],
+      // Enable Browser toolbox test script execution via env variable
+      ["devtools.browser-toolbox.allow-unsafe-script", true],
+    ]};
+    SpecialPowers.pushPrefEnv(options, resolve);
+  });
+
+  let { tab, document } = yield openAboutDebugging("addons");
+  yield installAddon(document, "addons/unpacked/install.rdf", ADDON_NAME,
+                     "test-devtools");
+
+  // Retrieve the DEBUG button for the addon
+  let names = [...document.querySelectorAll("#addons .target-name")];
+  let name = names.filter(element => element.textContent === ADDON_NAME)[0];
+  ok(name, "Found the addon in the list");
+  let targetElement = name.parentNode.parentNode;
+  let debugBtn = targetElement.querySelector(".debug-button");
+  ok(debugBtn, "Found its debug button");
+
+  // Wait for a notification sent by a script evaluated the test addon via
+  // the web console.
+  let onCustomMessage = new Promise(done => {
+    Services.obs.addObserver(function listener() {
+      Services.obs.removeObserver(listener, "addon-console-works");
+      done();
+    }, "addon-console-works", false);
+  });
+
+  // Be careful, this JS function is going to be executed in the addon toolbox,
+  // which lives in another process. So do not try to use any scope variable!
+  let env = Cc["@mozilla.org/process/environment;1"]
+              .getService(Ci.nsIEnvironment);
+  let testScript = function() {
+    /* eslint-disable no-undef */
+    toolbox.selectTool("webconsole")
+      .then(console => {
+        let { jsterm } = console.hud;
+        return jsterm.execute("myBootstrapAddonFunction()");
+      })
+      .then(() => toolbox.destroy());
+    /* eslint-enable no-undef */
+  };
+  env.set("MOZ_TOOLBOX_TEST_SCRIPT", "new " + testScript);
+  registerCleanupFunction(() => {
+    env.set("MOZ_TOOLBOX_TEST_SCRIPT", "");
+  });
+
+  let onToolboxClose = BrowserToolboxProcess.once("close");
+
+  debugBtn.click();
+
+  yield onCustomMessage;
+  ok(true, "Received the notification message from the bootstrap.js function");
+
+  yield onToolboxClose;
+  ok(true, "Addon toolbox closed");
+
+  yield uninstallAddon(document, ADDON_ID, ADDON_NAME);
+  yield closeAboutDebugging(tab);
+});