diff --git a/src/editors/containers/TextEditor/hooks.js b/src/editors/containers/TextEditor/hooks.js
index fa314be19..5a9b84ba3 100644
--- a/src/editors/containers/TextEditor/hooks.js
+++ b/src/editors/containers/TextEditor/hooks.js
@@ -16,15 +16,24 @@ export const state = StrictDict({
   refReady: (val) => useState(val),
 });
 
-export const addImageUploadBehavior = ({ openModal, setImage }) => (editor) => {
+export const setupCustomBehavior = ({ openModal, setImage }) => (editor) => {
+  // image upload button
   editor.ui.registry.addButton(tinyMCE.buttons.imageUploadButton, {
     icon: 'image',
     onAction: openModal,
   });
+  // editing an existing image
   editor.ui.registry.addButton(tinyMCE.buttons.editImageSettings, {
     icon: 'image',
     onAction: module.openModalWithSelectedImage({ editor, setImage, openModal }),
   });
+  // overriding the code plugin's icon with 'HTML' text
+  const openCodeEditor = () => editor.execCommand('mceCodeEditor');
+  editor.ui.registry.addButton(tinyMCE.buttons.code, {
+    text: 'HTML',
+    tooltip: 'Source code',
+    onAction: openCodeEditor,
+  });
 };
 
 export const editorConfig = ({
@@ -40,7 +49,7 @@ export const editorConfig = ({
   },
   initialValue: blockValue ? blockValue.data.data : '',
   init: {
-    setup: module.addImageUploadBehavior({ openModal, setImage: setSelection }),
+    setup: module.setupCustomBehavior({ openModal, setImage: setSelection }),
     plugins: pluginConfig.plugins,
     imagetools_toolbar: pluginConfig.imageToolbar,
     toolbar: pluginConfig.toolbar,
diff --git a/src/editors/containers/TextEditor/hooks.test.jsx b/src/editors/containers/TextEditor/hooks.test.jsx
index 6d07eedad..8610dd446 100644
--- a/src/editors/containers/TextEditor/hooks.test.jsx
+++ b/src/editors/containers/TextEditor/hooks.test.jsx
@@ -54,7 +54,7 @@ describe('TextEditor hooks', () => {
     beforeEach(() => { state.mock(); });
     afterEach(() => { state.restore(); });
 
-    describe('addImageUploadBehavior', () => {
+    describe('setupCustomBehavior', () => {
       test('It calls addButton in the editor, but openModal is not called', () => {
         const addButton = jest.fn();
         const openModal = jest.fn();
@@ -64,12 +64,14 @@ describe('TextEditor hooks', () => {
         };
         const mockOpenModalWithImage = args => ({ openModalWithSelectedImage: args });
         const expectedSettingsAction = mockOpenModalWithImage({ editor, setImage, openModal });
+        const openCodeEditor = expect.any(Function);
         jest.spyOn(module, moduleKeys.openModalWithSelectedImage)
           .mockImplementationOnce(mockOpenModalWithImage);
-        output = module.addImageUploadBehavior({ openModal, setImage })(editor);
+        output = module.setupCustomBehavior({ openModal, setImage })(editor);
         expect(addButton.mock.calls).toEqual([
           [tinyMCE.buttons.imageUploadButton, { icon: 'image', onAction: openModal }],
           [tinyMCE.buttons.editImageSettings, { icon: 'image', onAction: expectedSettingsAction }],
+          [tinyMCE.buttons.code, { text: 'HTML', tooltip: 'Source code', onAction: openCodeEditor }],
         ]);
         expect(openModal).not.toHaveBeenCalled();
       });
@@ -82,13 +84,13 @@ describe('TextEditor hooks', () => {
       };
       const evt = 'fakeEvent';
       const editor = 'myEditor';
-      const addImageUploadBehavior = args => ({ addImageUploadBehvaior: args });
+      const setupCustomBehavior = args => ({ setupCustomBehavior: args });
       beforeEach(() => {
         props.setEditorRef = jest.fn();
         props.openModal = jest.fn();
         props.initializeEditor = jest.fn();
-        jest.spyOn(module, moduleKeys.addImageUploadBehavior)
-          .mockImplementationOnce(addImageUploadBehavior);
+        jest.spyOn(module, moduleKeys.setupCustomBehavior)
+          .mockImplementationOnce(setupCustomBehavior);
         output = module.editorConfig(props);
       });
       test('It creates an onInit which calls initializeEditor and setEditorRef', () => {
@@ -115,9 +117,9 @@ describe('TextEditor hooks', () => {
         // Commented out as we investigate whether this is only needed for image proxy
         // expect(output.init.imagetools_cors_hosts).toMatchObject([props.lmsEndpointUrl]);
       });
-      it('calls addImageUploadBehavior on setup', () => {
+      it('calls setupCustomBehavior on setup', () => {
         expect(output.init.setup).toEqual(
-          addImageUploadBehavior({ openModal: props.openModal, setImage: props.setSelection }),
+          setupCustomBehavior({ openModal: props.openModal, setImage: props.setSelection }),
         );
       });
     });
diff --git a/src/editors/data/constants/tinyMCE.js b/src/editors/data/constants/tinyMCE.js
index 05ad1bcc1..baeeb67b3 100644
--- a/src/editors/data/constants/tinyMCE.js
+++ b/src/editors/data/constants/tinyMCE.js
@@ -21,7 +21,7 @@ export const buttons = StrictDict({
   bold: 'bold',
   bullist: 'bullist',
   charmap: 'charmap',
-  code: 'code',
+  code: 'code-modified', // use a custom button name, consistently, for our text-only button
   codesample: 'codesample',
   editImageSettings: 'editimagesettings',
   emoticons: 'emoticons',