--- a/devtools/client/webconsole/new-console-output/test/components/console-api-call.test.js
+++ b/devtools/client/webconsole/new-console-output/test/components/console-api-call.test.js
@@ -175,20 +175,44 @@ describe("ConsoleAPICall component:", ()
     });
   });
 
   describe("console.group", () => {
     it("renders", () => {
       const message = stubPreparedMessages.get("console.group('bar')");
       const wrapper = render(ConsoleApiCall({ message, serviceContainer, open: true }));
 
-      expect(wrapper.find(".message-body").text()).toBe(message.messageText);
+      expect(wrapper.find(".message-body").text()).toBe("bar");
       expect(wrapper.find(".theme-twisty.open").length).toBe(1);
     });
 
+    it("renders group with custom style", () => {
+      const message = stubPreparedMessages.get("console.group(%cfoo%cbar)");
+      const wrapper = render(ConsoleApiCall({ message, serviceContainer }));
+
+      const elements = wrapper.find(".objectBox-string");
+      expect(elements.text()).toBe("foobar");
+      expect(elements.length).toBe(2);
+
+      const firstElementStyle = elements.eq(0).prop("style");
+      // Allowed styles are applied accordingly on the first element.
+      expect(firstElementStyle.color).toBe(`blue`);
+      expect(firstElementStyle["font-size"]).toBe(`1.3em`);
+      // Forbidden styles are not applied.
+      expect(firstElementStyle["background-image"]).toBe(undefined);
+      expect(firstElementStyle.position).toBe(undefined);
+      expect(firstElementStyle.top).toBe(undefined);
+
+      const secondElementStyle = elements.eq(1).prop("style");
+      // Allowed styles are applied accordingly on the second element.
+      expect(secondElementStyle.color).toBe(`red`);
+      // Forbidden styles are not applied.
+      expect(secondElementStyle.background).toBe(undefined);
+    });
+
     it("toggle the group when the collapse button is clicked", () => {
       const store = setupStore([]);
       store.dispatch = sinon.spy();
       const message = stubPreparedMessages.get("console.group('bar')");
 
       let wrapper = mount(Provider({store},
         ConsoleApiCall({
           message,
@@ -230,19 +254,43 @@ describe("ConsoleAPICall component:", ()
     });
   });
 
   describe("console.groupCollapsed", () => {
     it("renders", () => {
       const message = stubPreparedMessages.get("console.groupCollapsed('foo')");
       const wrapper = render(ConsoleApiCall({ message, serviceContainer, open: false}));
 
-      expect(wrapper.find(".message-body").text()).toBe(message.messageText);
+      expect(wrapper.find(".message-body").text()).toBe("foo");
       expect(wrapper.find(".theme-twisty:not(.open)").length).toBe(1);
     });
+
+    it("renders group with custom style", () => {
+      const message = stubPreparedMessages.get("console.groupCollapsed(%cfoo%cbaz)");
+      const wrapper = render(ConsoleApiCall({ message, serviceContainer }));
+
+      const elements = wrapper.find(".objectBox-string");
+      expect(elements.text()).toBe("foobaz");
+      expect(elements.length).toBe(2);
+
+      const firstElementStyle = elements.eq(0).prop("style");
+      // Allowed styles are applied accordingly on the first element.
+      expect(firstElementStyle.color).toBe(`blue`);
+      expect(firstElementStyle["font-size"]).toBe(`1.3em`);
+      // Forbidden styles are not applied.
+      expect(firstElementStyle["background-image"]).toBe(undefined);
+      expect(firstElementStyle.position).toBe(undefined);
+      expect(firstElementStyle.top).toBe(undefined);
+
+      const secondElementStyle = elements.eq(1).prop("style");
+      // Allowed styles are applied accordingly on the second element.
+      expect(secondElementStyle.color).toBe(`red`);
+      // Forbidden styles are not applied.
+      expect(secondElementStyle.background).toBe(undefined);
+    });
   });
 
   describe("console.dirxml", () => {
     it("renders", () => {
       const message = stubPreparedMessages.get("console.dirxml(window)");
       const wrapper = render(ConsoleApiCall({ message, serviceContainer }));
 
       expect(wrapper.find(".message-body").text())

--- a/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/stub-snippets.js
+++ b/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/stub-snippets.js
@@ -80,16 +80,36 @@ consoleApi.set("console.log(%cfoobar)", 
   keys: ["console.log(%cfoobar)"],
   code: `
 console.log(
   "%cfoo%cbar",
   "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
   "color:red;background:\\165rl('http://example.com/test')");
 `});
 
+consoleApi.set("console.group(%cfoo%cbar)", {
+  keys: ["console.group(%cfoo%cbar)", "console.groupEnd(%cfoo%cbar)"],
+  code: `
+console.group(
+  "%cfoo%cbar",
+  "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
+  "color:red;background:\\165rl('http://example.com/test')");
+console.groupEnd();
+`});
+
+consoleApi.set("console.groupCollapsed(%cfoo%cbaz)", {
+  keys: ["console.groupCollapsed(%cfoo%cbaz)", "console.groupEnd(%cfoo%cbaz)"],
+  code: `
+console.groupCollapsed(
+  "%cfoo%cbaz",
+  "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
+  "color:red;background:\\165rl('http://example.com/test')");
+console.groupEnd();
+`});
+
 // CSS messages
 const cssMessage = new Map();
 
 cssMessage.set("Unknown property", `
 p {
   such-unknown-property: wow;
 }
 `);

--- a/devtools/client/webconsole/new-console-output/test/fixtures/stubs/consoleApi.js
+++ b/devtools/client/webconsole/new-console-output/test/fixtures/stubs/consoleApi.js
@@ -519,20 +519,22 @@ stubPreparedMessages.set("console.table(
 
 stubPreparedMessages.set("console.group('bar')", new ConsoleMessage({
   "id": "1",
   "allowRepeating": true,
   "source": "console-api",
   "timeStamp": 1479159914984,
   "type": "startGroup",
   "level": "log",
-  "messageText": "bar",
-  "parameters": null,
+  "messageText": null,
+  "parameters": [
+    "bar"
+  ],
   "repeat": 1,
-  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1479159914984,\"type\":\"startGroup\",\"level\":\"log\",\"messageText\":\"bar\",\"parameters\":null,\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1479159914984,\"type\":\"startGroup\",\"level\":\"log\",\"messageText\":null,\"parameters\":[\"bar\"],\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
   "stacktrace": null,
   "frame": {
     "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "line": 2,
     "column": 1
   },
   "groupId": null,
   "exceptionDocURL": null,
@@ -565,20 +567,22 @@ stubPreparedMessages.set("console.groupE
 
 stubPreparedMessages.set("console.groupCollapsed('foo')", new ConsoleMessage({
   "id": "1",
   "allowRepeating": true,
   "source": "console-api",
   "timeStamp": 1479159916153,
   "type": "startGroupCollapsed",
   "level": "log",
-  "messageText": "foo",
-  "parameters": null,
+  "messageText": null,
+  "parameters": [
+    "foo"
+  ],
   "repeat": 1,
-  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1479159916153,\"type\":\"startGroupCollapsed\",\"level\":\"log\",\"messageText\":\"foo\",\"parameters\":null,\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1479159916153,\"type\":\"startGroupCollapsed\",\"level\":\"log\",\"messageText\":null,\"parameters\":[\"foo\"],\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
   "stacktrace": null,
   "frame": {
     "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "line": 2,
     "column": 1
   },
   "groupId": null,
   "exceptionDocURL": null,
@@ -611,20 +615,22 @@ stubPreparedMessages.set("console.groupE
 
 stubPreparedMessages.set("console.group()", new ConsoleMessage({
   "id": "1",
   "allowRepeating": true,
   "source": "console-api",
   "timeStamp": 1479159917524,
   "type": "startGroup",
   "level": "log",
-  "messageText": "<no group label>",
-  "parameters": null,
+  "messageText": null,
+  "parameters": [
+    "<no group label>"
+  ],
   "repeat": 1,
-  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1479159917524,\"type\":\"startGroup\",\"level\":\"log\",\"messageText\":\"<no group label>\",\"parameters\":null,\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1479159917524,\"type\":\"startGroup\",\"level\":\"log\",\"messageText\":null,\"parameters\":[\"<no group label>\"],\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
   "stacktrace": null,
   "frame": {
     "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "line": 2,
     "column": 1
   },
   "groupId": null,
   "exceptionDocURL": null,
@@ -679,16 +685,120 @@ stubPreparedMessages.set("console.log(%c
   "exceptionDocURL": null,
   "userProvidedStyles": [
     "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
     "color:red;background:url('http://example.com/test')"
   ],
   "notes": null
 }));
 
+stubPreparedMessages.set("console.group(%cfoo%cbar)", new ConsoleMessage({
+  "id": "1",
+  "allowRepeating": true,
+  "source": "console-api",
+  "timeStamp": 1491902018670,
+  "type": "startGroup",
+  "level": "log",
+  "messageText": null,
+  "parameters": [
+    "foo",
+    "bar"
+  ],
+  "repeat": 1,
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1491902018670,\"type\":\"startGroup\",\"level\":\"log\",\"messageText\":null,\"parameters\":[\"foo\",\"bar\"],\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[\"color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px\",\"color:red;background:url('http://example.com/test')\"],\"notes\":null}",
+  "stacktrace": null,
+  "frame": {
+    "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "line": 2,
+    "column": 1
+  },
+  "groupId": null,
+  "exceptionDocURL": null,
+  "userProvidedStyles": [
+    "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
+    "color:red;background:url('http://example.com/test')"
+  ],
+  "notes": null
+}));
+
+stubPreparedMessages.set("console.groupEnd(%cfoo%cbar)", new ConsoleMessage({
+  "id": "1",
+  "allowRepeating": true,
+  "source": "console-api",
+  "timeStamp": 1491902018671,
+  "type": "endGroup",
+  "level": "log",
+  "messageText": null,
+  "parameters": null,
+  "repeat": 1,
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1491902018671,\"type\":\"endGroup\",\"level\":\"log\",\"messageText\":null,\"parameters\":null,\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":6,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
+  "stacktrace": null,
+  "frame": {
+    "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "line": 6,
+    "column": 1
+  },
+  "groupId": null,
+  "exceptionDocURL": null,
+  "userProvidedStyles": [],
+  "notes": null
+}));
+
+stubPreparedMessages.set("console.groupCollapsed(%cfoo%cbaz)", new ConsoleMessage({
+  "id": "1",
+  "allowRepeating": true,
+  "source": "console-api",
+  "timeStamp": 1491902018683,
+  "type": "startGroupCollapsed",
+  "level": "log",
+  "messageText": null,
+  "parameters": [
+    "foo",
+    "baz"
+  ],
+  "repeat": 1,
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1491902018683,\"type\":\"startGroupCollapsed\",\"level\":\"log\",\"messageText\":null,\"parameters\":[\"foo\",\"baz\"],\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":2,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[\"color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px\",\"color:red;background:url('http://example.com/test')\"],\"notes\":null}",
+  "stacktrace": null,
+  "frame": {
+    "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "line": 2,
+    "column": 1
+  },
+  "groupId": null,
+  "exceptionDocURL": null,
+  "userProvidedStyles": [
+    "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
+    "color:red;background:url('http://example.com/test')"
+  ],
+  "notes": null
+}));
+
+stubPreparedMessages.set("console.groupEnd(%cfoo%cbaz)", new ConsoleMessage({
+  "id": "1",
+  "allowRepeating": true,
+  "source": "console-api",
+  "timeStamp": 1491902018685,
+  "type": "endGroup",
+  "level": "log",
+  "messageText": null,
+  "parameters": null,
+  "repeat": 1,
+  "repeatId": "{\"id\":null,\"allowRepeating\":true,\"source\":\"console-api\",\"timeStamp\":1491902018685,\"type\":\"endGroup\",\"level\":\"log\",\"messageText\":null,\"parameters\":null,\"repeatId\":null,\"stacktrace\":null,\"frame\":{\"source\":\"http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html\",\"line\":6,\"column\":1},\"groupId\":null,\"exceptionDocURL\":null,\"userProvidedStyles\":[],\"notes\":null}",
+  "stacktrace": null,
+  "frame": {
+    "source": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "line": 6,
+    "column": 1
+  },
+  "groupId": null,
+  "exceptionDocURL": null,
+  "userProvidedStyles": [],
+  "notes": null
+}));
+
 stubPackets.set("console.log('foobar', 'test')", {
   "from": "server1.conn0.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
     "addonId": "",
     "arguments": [
       "foobar",
       "test"
@@ -1196,20 +1306,20 @@ stubPackets.set("console.group('bar')", 
     "columnNumber": 1,
     "counter": null,
     "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "functionName": "triggerPacket",
     "groupName": "bar",
     "level": "group",
     "lineNumber": 2,
     "private": false,
+    "styles": [],
     "timeStamp": 1479159914984,
     "timer": null,
     "workerType": "none",
-    "styles": [],
     "category": "webdev"
   }
 });
 
 stubPackets.set("console.groupEnd('bar')", {
   "from": "server1.conn16.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
@@ -1220,20 +1330,20 @@ stubPackets.set("console.groupEnd('bar')
     "columnNumber": 1,
     "counter": null,
     "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "functionName": "triggerPacket",
     "groupName": "bar",
     "level": "groupEnd",
     "lineNumber": 3,
     "private": false,
+    "styles": [],
     "timeStamp": 1479159914987,
     "timer": null,
     "workerType": "none",
-    "styles": [],
     "category": "webdev"
   }
 });
 
 stubPackets.set("console.groupCollapsed('foo')", {
   "from": "server1.conn17.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
@@ -1244,20 +1354,20 @@ stubPackets.set("console.groupCollapsed(
     "columnNumber": 1,
     "counter": null,
     "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "functionName": "triggerPacket",
     "groupName": "foo",
     "level": "groupCollapsed",
     "lineNumber": 2,
     "private": false,
+    "styles": [],
     "timeStamp": 1479159916153,
     "timer": null,
     "workerType": "none",
-    "styles": [],
     "category": "webdev"
   }
 });
 
 stubPackets.set("console.groupEnd('foo')", {
   "from": "server1.conn17.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
@@ -1268,20 +1378,20 @@ stubPackets.set("console.groupEnd('foo')
     "columnNumber": 1,
     "counter": null,
     "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "functionName": "triggerPacket",
     "groupName": "foo",
     "level": "groupEnd",
     "lineNumber": 3,
     "private": false,
+    "styles": [],
     "timeStamp": 1479159916155,
     "timer": null,
     "workerType": "none",
-    "styles": [],
     "category": "webdev"
   }
 });
 
 stubPackets.set("console.group()", {
   "from": "server1.conn18.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
@@ -1290,20 +1400,20 @@ stubPackets.set("console.group()", {
     "columnNumber": 1,
     "counter": null,
     "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "functionName": "triggerPacket",
     "groupName": "",
     "level": "group",
     "lineNumber": 2,
     "private": false,
+    "styles": [],
     "timeStamp": 1479159917524,
     "timer": null,
     "workerType": "none",
-    "styles": [],
     "category": "webdev"
   }
 });
 
 stubPackets.set("console.groupEnd()", {
   "from": "server1.conn18.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
@@ -1312,20 +1422,20 @@ stubPackets.set("console.groupEnd()", {
     "columnNumber": 1,
     "counter": null,
     "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
     "functionName": "triggerPacket",
     "groupName": "",
     "level": "groupEnd",
     "lineNumber": 3,
     "private": false,
+    "styles": [],
     "timeStamp": 1479159917526,
     "timer": null,
     "workerType": "none",
-    "styles": [],
     "category": "webdev"
   }
 });
 
 stubPackets.set("console.log(%cfoobar)", {
   "from": "server1.conn19.child1/consoleActor2",
   "type": "consoleAPICall",
   "message": {
@@ -1348,12 +1458,112 @@ stubPackets.set("console.log(%cfoobar)",
     ],
     "timeStamp": 1479159919144,
     "timer": null,
     "workerType": "none",
     "category": "webdev"
   }
 });
 
+stubPackets.set("console.group(%cfoo%cbar)", {
+  "from": "server1.conn0.child1/consoleActor2",
+  "type": "consoleAPICall",
+  "message": {
+    "addonId": "",
+    "arguments": [
+      "foo",
+      "bar"
+    ],
+    "columnNumber": 1,
+    "counter": null,
+    "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "functionName": "triggerPacket",
+    "groupName": "foo bar",
+    "level": "group",
+    "lineNumber": 2,
+    "private": false,
+    "styles": [
+      "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
+      "color:red;background:url('http://example.com/test')"
+    ],
+    "timeStamp": 1491902018670,
+    "timer": null,
+    "workerType": "none",
+    "category": "webdev"
+  }
+});
+
+stubPackets.set("console.groupEnd(%cfoo%cbar)", {
+  "from": "server1.conn0.child1/consoleActor2",
+  "type": "consoleAPICall",
+  "message": {
+    "addonId": "",
+    "arguments": [],
+    "columnNumber": 1,
+    "counter": null,
+    "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "functionName": "triggerPacket",
+    "groupName": "",
+    "level": "groupEnd",
+    "lineNumber": 6,
+    "private": false,
+    "styles": [],
+    "timeStamp": 1491902018671,
+    "timer": null,
+    "workerType": "none",
+    "category": "webdev"
+  }
+});
+
+stubPackets.set("console.groupCollapsed(%cfoo%cbaz)", {
+  "from": "server1.conn0.child1/consoleActor2",
+  "type": "consoleAPICall",
+  "message": {
+    "addonId": "",
+    "arguments": [
+      "foo",
+      "baz"
+    ],
+    "columnNumber": 1,
+    "counter": null,
+    "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "functionName": "triggerPacket",
+    "groupName": "foo baz",
+    "level": "groupCollapsed",
+    "lineNumber": 2,
+    "private": false,
+    "styles": [
+      "color:blue;font-size:1.3em;background:url('http://example.com/test');position:absolute;top:10px",
+      "color:red;background:url('http://example.com/test')"
+    ],
+    "timeStamp": 1491902018683,
+    "timer": null,
+    "workerType": "none",
+    "category": "webdev"
+  }
+});
+
+stubPackets.set("console.groupEnd(%cfoo%cbaz)", {
+  "from": "server1.conn0.child1/consoleActor2",
+  "type": "consoleAPICall",
+  "message": {
+    "addonId": "",
+    "arguments": [],
+    "columnNumber": 1,
+    "counter": null,
+    "filename": "http://example.com/browser/devtools/client/webconsole/new-console-output/test/fixtures/stub-generators/test-console-api.html",
+    "functionName": "triggerPacket",
+    "groupName": "",
+    "level": "groupEnd",
+    "lineNumber": 6,
+    "private": false,
+    "styles": [],
+    "timeStamp": 1491902018685,
+    "timer": null,
+    "workerType": "none",
+    "category": "webdev"
+  }
+});
+
 module.exports = {
   stubPreparedMessages,
   stubPackets,
 };