diff --git a/client/src/templates/Challenges/classic/editor-tabs.tsx b/client/src/templates/Challenges/classic/editor-tabs.tsx
index 59ee717f66f..0c26fd0c589 100644
--- a/client/src/templates/Challenges/classic/editor-tabs.tsx
+++ b/client/src/templates/Challenges/classic/editor-tabs.tsx
@@ -44,6 +44,7 @@ class EditorTabs extends Component<EditorTabsProps> {
             <button
               aria-expanded={visibleEditors[challengeFile.fileKey] ?? 'false'}
               key={challengeFile.fileKey}
+              data-cy={`editor-tab-${challengeFile.fileKey}`}
               onClick={() => toggleVisibleEditor(challengeFile.fileKey)}
             >
               {`${challengeFile.name}.${challengeFile.ext}`}{' '}
diff --git a/client/src/templates/Challenges/classic/editor.tsx b/client/src/templates/Challenges/classic/editor.tsx
index 0e12048b9a7..8f2fdaafcd6 100644
--- a/client/src/templates/Challenges/classic/editor.tsx
+++ b/client/src/templates/Challenges/classic/editor.tsx
@@ -40,7 +40,7 @@ import {
 } from '../../../redux/prop-types';
 import { editorToneOptions } from '../../../utils/tone/editor-config';
 import { editorNotes } from '../../../utils/tone/editor-notes';
-import { challengeTypes } from '../../../../utils/challenge-types';
+import { challengeTypes, isProject } from '../../../../utils/challenge-types';
 import {
   canFocusEditorSelector,
   challengeMetaSelector,
@@ -430,7 +430,7 @@ const Editor = (props: EditorProps): JSX.Element => {
       /* eslint-disable no-bitwise */
       keybindings: [monaco.KeyMod.CtrlCmd | monaco.KeyCode.Enter],
       run: () => {
-        if (props.usesMultifileEditor) {
+        if (props.usesMultifileEditor && !isProject(props.challengeType)) {
           if (challengeIsComplete()) {
             tryToSubmitChallenge();
           } else {
diff --git a/client/src/templates/Challenges/classic/multifile-editor.tsx b/client/src/templates/Challenges/classic/multifile-editor.tsx
index 0fc5ba87add..08b431a54a3 100644
--- a/client/src/templates/Challenges/classic/multifile-editor.tsx
+++ b/client/src/templates/Challenges/classic/multifile-editor.tsx
@@ -129,7 +129,12 @@ const MultifileEditor = (props: MultifileEditorProps) => {
               );
             } else {
               return (
-                <ReflexElement {...reflexProps} {...resizeProps} key={key}>
+                <ReflexElement
+                  data-cy={`editor-container-${key}`}
+                  {...reflexProps}
+                  {...resizeProps}
+                  key={key}
+                >
                   <Editor
                     canFocusOnMountRef={canFocusOnMountRef}
                     challengeFiles={challengeFiles}
diff --git a/client/src/templates/Challenges/classic/show.tsx b/client/src/templates/Challenges/classic/show.tsx
index 048698bafe3..58c3343f498 100644
--- a/client/src/templates/Challenges/classic/show.tsx
+++ b/client/src/templates/Challenges/classic/show.tsx
@@ -478,6 +478,7 @@ class ShowClassic extends Component<ShowClassicProps, ShowClassicState> {
 
     return (
       <Hotkeys
+        challengeType={challengeType}
         editorRef={this.editorRef as React.RefObject<HTMLElement>}
         executeChallenge={executeChallenge}
         innerRef={this.containerRef}
diff --git a/client/src/templates/Challenges/components/Hotkeys.tsx b/client/src/templates/Challenges/components/Hotkeys.tsx
index bccee0b47ee..cede24740e7 100644
--- a/client/src/templates/Challenges/components/Hotkeys.tsx
+++ b/client/src/templates/Challenges/components/Hotkeys.tsx
@@ -15,6 +15,7 @@ import {
   openModal
 } from '../redux';
 import './hotkeys.css';
+import { isProject } from '../../../../utils/challenge-types';
 
 const mapStateToProps = createSelector(
   canFocusEditorSelector,
@@ -53,6 +54,7 @@ const keyMap = {
 interface HotkeysProps {
   canFocusEditor: boolean;
   challengeFiles: ChallengeFiles;
+  challengeType?: number;
   children: React.ReactElement;
   editorRef?: React.RefObject<HTMLElement>;
   executeChallenge?: (options?: { showCompletionModal: boolean }) => void;
@@ -70,6 +72,7 @@ interface HotkeysProps {
 
 function Hotkeys({
   canFocusEditor,
+  challengeType,
   children,
   instructionsPanelRef,
   editorRef,
@@ -96,7 +99,11 @@ function Hotkeys({
 
       const testsArePassing = tests.every(test => test.pass && !test.err);
 
-      if (usesMultifileEditor) {
+      if (
+        usesMultifileEditor &&
+        typeof challengeType == 'number' &&
+        !isProject(challengeType)
+      ) {
         if (testsArePassing) {
           submitChallenge();
         } else {
diff --git a/client/utils/challenge-types.js b/client/utils/challenge-types.js
index c9a15a4cfb4..2ad68fcddcb 100644
--- a/client/utils/challenge-types.js
+++ b/client/utils/challenge-types.js
@@ -41,15 +41,15 @@ exports.challengeTypes = {
   multifileCertProject
 };
 
-// (Oliver) I don't think we need this for codeally projects, so they're ignored
-// here
 exports.isProject = challengeType => {
   if (typeof challengeType !== 'number')
     throw Error('challengeType must be a number');
   return (
     challengeType === frontEndProject ||
     challengeType === backEndProject ||
-    challengeType === pythonProject
+    challengeType === pythonProject ||
+    challengeType === codeAllyCert ||
+    challengeType === multifileCertProject
   );
 };
 
diff --git a/cypress/integration/learn/challenges/projects.js b/cypress/integration/learn/challenges/projects.js
index 8db92d1ccc6..b6b54e9e088 100644
--- a/cypress/integration/learn/challenges/projects.js
+++ b/cypress/integration/learn/challenges/projects.js
@@ -136,4 +136,52 @@ describe('project submission', () => {
       });
     }
   );
+
+  it(
+    'Ctrl + enter triggers the completion modal on multifile projects',
+    { browser: 'electron' },
+    () => {
+      cy.fixture('../../config/curriculum.json').then(curriculum => {
+        const targetBlock = 'build-a-personal-portfolio-webpage-project';
+        const portfolioBlock = Object.values(curriculum).filter(
+          ({ blocks }) => blocks[targetBlock]
+        )[0];
+        const { challenges, meta } = portfolioBlock.blocks[targetBlock];
+
+        const projectTitle = meta.challengeOrder[0][1];
+        const { block, superBlock, dashedName, solutions } = challenges.find(
+          ({ title }) => title === projectTitle
+        );
+
+        const url = `/learn/${superBlock}/${block}/${dashedName}`;
+        cy.visit(url);
+
+        solutions[0].forEach(({ contents, fileKey }) => {
+          const tabSelector = `[data-cy=editor-tab-${fileKey}]`;
+          if (fileKey !== 'indexhtml') {
+            cy.get(tabSelector).click();
+          }
+          const editorContainerSelector = `[data-cy=editor-container-${fileKey}]`;
+          cy.get(editorContainerSelector, { timeout: 16000 })
+            .find(selectors.editor, { timeout: 16000 })
+            .click()
+            .focused()
+            .type('{ctrl+a}{del}');
+          // NOTE: clipboard operations are flaky in watch mode, because
+          // the document can lose focus
+          cy.window().its('navigator.clipboard').invoke('writeText', contents);
+          cy.document().invoke('execCommand', 'paste');
+        });
+
+        cy.get('[data-cy=editor-container-indexhtml', { timeout: 16000 })
+          .find(selectors.editor, { timeout: 16000 })
+          .click()
+          .focused()
+          .type('{ctrl+enter}');
+        // check the modal exists
+        cy.contains('Submit and go to next challenge');
+        cy.contains('Download my solution');
+      });
+    }
+  );
 });