diff --git a/packages/compat/src/compat-app-builder.ts b/packages/compat/src/compat-app-builder.ts
index a6f50740c..290d701e7 100644
--- a/packages/compat/src/compat-app-builder.ts
+++ b/packages/compat/src/compat-app-builder.ts
@@ -127,13 +127,10 @@ export class CompatAppBuilder {
     return ['.wasm', '.mjs', '.js', '.json', '.ts', '.hbs', '.hbs.js', '.gjs', '.gts'];
   }
 
-  private addEmberEntrypoints(htmlTreePath: string): string[] {
-    let classicEntrypoints = ['index.html', 'tests/index.html'];
-    if (!this.compatApp.shouldBuildTests) {
-      classicEntrypoints.pop();
-    }
+  private addEmberEntrypoints(): string[] {
+    let classicEntrypoints = ['index.html'];
     for (let entrypoint of classicEntrypoints) {
-      let sourcePath = join(htmlTreePath, entrypoint);
+      let sourcePath = join(this.compatApp.root, entrypoint);
       let rewrittenAppPath = join(this.root, entrypoint);
       writeFileSync(rewrittenAppPath, readFileSync(sourcePath));
     }
@@ -463,7 +460,7 @@ export class CompatAppBuilder {
     }
 
     let appFiles = this.updateAppJS(inputPaths.appJS);
-    let assetPaths = this.addEmberEntrypoints(inputPaths.htmlTree);
+    let assetPaths = this.addEmberEntrypoints();
 
     if (this.activeFastboot) {
       // when using fastboot, our own package.json needs to be in the output so fastboot can read it.
@@ -741,7 +738,6 @@ function addCachablePlugin(babelConfig: TransformOptions) {
 
 interface TreeNames {
   appJS: BroccoliNode;
-  htmlTree: BroccoliNode;
   publicTree: BroccoliNode | undefined;
   configTree: BroccoliNode;
 }
diff --git a/packages/compat/src/compat-app.ts b/packages/compat/src/compat-app.ts
index d231ceae5..32459e261 100644
--- a/packages/compat/src/compat-app.ts
+++ b/packages/compat/src/compat-app.ts
@@ -96,10 +96,6 @@ export default class CompatApp {
     return require(resolve.sync(specifier, { basedir: this.emberCLILocation }));
   }
 
-  private get configReplace() {
-    return this.requireFromEmberCLI('broccoli-config-replace');
-  }
-
   private get configLoader() {
     return this.requireFromEmberCLI('broccoli-config-loader');
   }
@@ -184,45 +180,6 @@ export default class CompatApp {
     };
   }
 
-  private get htmlTree() {
-    if (this.legacyEmberAppInstance.tests) {
-      return mergeTrees([this.indexTree, this.testIndexTree]);
-    } else {
-      return this.indexTree;
-    }
-  }
-
-  private get indexTree() {
-    let indexFilePath = this.legacyEmberAppInstance.options.outputPaths.app.html;
-    let index = buildFunnel(this.legacyEmberAppInstance.trees.app, {
-      allowEmpty: true,
-      include: [`index.html`],
-      getDestinationPath: () => indexFilePath,
-      annotation: 'app/index.html',
-    });
-    return new this.configReplace(index, this.configTree, {
-      configPath: join('environments', `${this.legacyEmberAppInstance.env}.json`),
-      files: [indexFilePath],
-      patterns: this.filteredPatternsByContentFor.others,
-      annotation: 'ConfigReplace/indexTree',
-    });
-  }
-
-  private get testIndexTree() {
-    let index = buildFunnel(this.legacyEmberAppInstance.trees.tests, {
-      allowEmpty: true,
-      include: [`index.html`],
-      destDir: 'tests',
-      annotation: 'tests/index.html',
-    });
-    return new this.configReplace(index, this.configTree, {
-      configPath: join('environments', `test.json`),
-      files: ['tests/index.html'],
-      patterns: this.filteredPatternsByContentFor.others,
-      annotation: 'ConfigReplace/testIndexTree',
-    });
-  }
-
   @Memoize()
   babelConfig(): TransformOptions {
     // this finds all the built-in babel configuration that comes with ember-cli-babel
@@ -727,7 +684,6 @@ export default class CompatApp {
 
     return {
       appJS: this.processAppJS().appJS,
-      htmlTree: this.htmlTree,
       publicTree,
       configTree,
       contentForTree,
diff --git a/tests/addon-template/tests/dummy/app/index.html b/tests/addon-template/tests/dummy/index.html
similarity index 100%
rename from tests/addon-template/tests/dummy/app/index.html
rename to tests/addon-template/tests/dummy/index.html
diff --git a/tests/app-template/app/index.html b/tests/app-template/index.html
similarity index 100%
rename from tests/app-template/app/index.html
rename to tests/app-template/index.html
diff --git a/tests/scenarios/compat-addon-classic-features-test.ts b/tests/scenarios/compat-addon-classic-features-test.ts
index 2700b77d1..a6ef2a8e0 100644
--- a/tests/scenarios/compat-addon-classic-features-test.ts
+++ b/tests/scenarios/compat-addon-classic-features-test.ts
@@ -60,8 +60,7 @@ appScenarios
           });
         };
       `,
-      app: {
-        'index.html': `
+      'index.html': `
           <!DOCTYPE html>
           <html>
             <head>
@@ -93,7 +92,6 @@ appScenarios
             </body>
           </html>
         `,
-      },
     });
   })
   .forEachScenario(scenario => {
diff --git a/tests/scenarios/compat-app-html-attributes-test.ts b/tests/scenarios/compat-app-html-attributes-test.ts
index e4875e132..ec04b0a28 100644
--- a/tests/scenarios/compat-app-html-attributes-test.ts
+++ b/tests/scenarios/compat-app-html-attributes-test.ts
@@ -8,13 +8,7 @@ const { module: Qmodule, test } = QUnit;
 
 appScenarios
   .map('compat-app-script-attributes', app => {
-    let appFolder = app.files.app;
-
-    if (appFolder === null || typeof appFolder !== 'object') {
-      throw new Error('app folder unexpectedly missing');
-    }
-
-    let indexHtml = appFolder['index.html'];
+    let indexHtml = app.files['index.html'];
 
     if (typeof indexHtml !== 'string') {
       throw new Error('index.html unexpectedly missing');
@@ -38,9 +32,7 @@ appScenarios
     indexHtml = indexHtml.replace(/<script /g, '<script defer ');
 
     app.mergeFiles({
-      app: {
-        'index.html': indexHtml,
-      },
+      'index.html': indexHtml,
     });
   })
   .forEachScenario(scenario => {
diff --git a/tests/ts-app-template/app/index.html b/tests/ts-app-template/index.html
similarity index 100%
rename from tests/ts-app-template/app/index.html
rename to tests/ts-app-template/index.html