diff --git a/packages/compat/src/compat-app-builder.ts b/packages/compat/src/compat-app-builder.ts
index 3e41a73b1..dbffb9f4d 100644
--- a/packages/compat/src/compat-app-builder.ts
+++ b/packages/compat/src/compat-app-builder.ts
@@ -303,6 +303,12 @@ export class CompatAppBuilder {
     let amdModules = nonFastboot.map(file => this.importPaths(appFiles, file));
     let fastbootOnlyAmdModules = fastboot.map(file => this.importPaths(appFiles, file));
 
+    let testModules: { runtime: string; buildtime: string }[] = [];
+
+    for (let relativePath of appFiles.tests) {
+      testModules.push(this.importPaths(appFiles, relativePath));
+    }
+
     let config: CompatResolverOptions = {
       // this part is the base ModuleResolverOptions as required by @embroider/core
       renameModules,
@@ -336,6 +342,7 @@ export class CompatAppBuilder {
       options,
       amdModules,
       fastbootOnlyAmdModules,
+      testModules,
     };
 
     return config;
@@ -1366,11 +1373,6 @@ export class CompatAppBuilder {
       return asset;
     }
 
-    // We're only building tests from the first engine (the app). This is the
-    // normal thing to do -- tests from engines don't automatically roll up into
-    // the app.
-    let engine = appFiles[0];
-
     const myName = 'assets/test.js';
 
     // tests necessarily also include the app. This is where we account for
@@ -1383,12 +1385,6 @@ export class CompatAppBuilder {
       explicitRelative(dirname(myName), this.topAppJSAsset(appFiles, prepared).relativePath),
     ];
 
-    let amdModules: { runtime: string; buildtime: string }[] = [];
-
-    for (let relativePath of engine.tests) {
-      amdModules.push(this.importPaths(engine, relativePath));
-    }
-
     let source = entryTemplate({
       eagerModules,
       testSuffix: true,
diff --git a/packages/compat/tests/audit.test.ts b/packages/compat/tests/audit.test.ts
index 33c9ca352..57f7cb228 100644
--- a/packages/compat/tests/audit.test.ts
+++ b/packages/compat/tests/audit.test.ts
@@ -53,6 +53,7 @@ describe('audit', function () {
       resolvableExtensions,
       amdModules: [],
       fastbootOnlyAmdModules: [],
+      testModules: [],
     };
 
     let babel: TransformOptions = {
diff --git a/packages/core/src/module-resolver.ts b/packages/core/src/module-resolver.ts
index a5b21f462..d69299c44 100644
--- a/packages/core/src/module-resolver.ts
+++ b/packages/core/src/module-resolver.ts
@@ -89,6 +89,7 @@ export interface Options {
   amdCompatibility: Required<UserOptions['amdCompatibility']>;
   amdModules: AmdModule[];
   fastbootOnlyAmdModules: AmdModule[];
+  testModules: AmdModule[];
 }
 
 export interface AmdModule {
diff --git a/packages/core/src/virtual-content.ts b/packages/core/src/virtual-content.ts
index bee65a9a9..b0dea1d90 100644
--- a/packages/core/src/virtual-content.ts
+++ b/packages/core/src/virtual-content.ts
@@ -298,11 +298,17 @@ function renderImplicitModules(
 }
 
 function renderAmdModules(
-  _amdModulesPlaceholderModule: { type: 'amd-modules' | 'amd-test-modules'; fromFile: string },
+  { type }: { type: 'amd-modules' | 'amd-test-modules'; fromFile: string },
   resolver: Resolver
 ): string {
+  const amdModules = [...resolver.options.amdModules];
+
+  if (type === 'amd-test-modules') {
+    amdModules.push(...resolver.options.testModules);
+  }
+
   return amdModulesTemplate({
-    amdModules: resolver.options.amdModules,
+    amdModules,
     fastbootOnlyAmdModules: resolver.options.fastbootOnlyAmdModules,
   });
 }
diff --git a/tests/scenarios/compat-resolver-test.ts b/tests/scenarios/compat-resolver-test.ts
index 3270ea958..cf8a2c30a 100644
--- a/tests/scenarios/compat-resolver-test.ts
+++ b/tests/scenarios/compat-resolver-test.ts
@@ -101,6 +101,7 @@ Scenarios.fromProject(() => new Project())
             ],
             amdModules: [],
             fastbootOnlyAmdModules: [],
+            testModules: [],
           };
 
           givenFiles({
diff --git a/tests/scenarios/compat-route-split-test.ts b/tests/scenarios/compat-route-split-test.ts
index 5b310164a..0c09b5bf0 100644
--- a/tests/scenarios/compat-route-split-test.ts
+++ b/tests/scenarios/compat-route-split-test.ts
@@ -120,12 +120,20 @@ splitScenarios
           .withContents(contents => {
             const [, objectName] = /"my-app\/controllers\/index": (amdMod\d+),/.exec(contents) ?? [];
 
-            return contents.includes(`import * as ${objectName} from "my-app\/controllers/index.js";`);
+            return contents.includes(`import * as ${objectName} from "my-app/controllers/index.js";`);
           }, 'controllers/index import/export should be present in the virtual -embroider-amd-modules.js file');
       });
 
       test('has non-split route templates in main entrypoint', function () {
-        expectFile('./assets/my-app.js').matches('templates/index');
+        expectAudit
+          .module('./assets/my-app.js')
+          .resolves('./-embroider-amd-modules.js')
+          .toModule()
+          .withContents(contents => {
+            const [, objectName] = /"my-app\/templates\/index": (amdMod\d+),/.exec(contents) ?? [];
+
+            return contents.includes(`import * as ${objectName} from "my-app/templates/index.hbs";`);
+          }, 'templates/index import/export should be present in the virtual -embroider-amd-modules.js file');
       });
 
       test('has non-split routes in main entrypoint', function () {
@@ -313,7 +321,15 @@ splitScenarios
       });
 
       test('has non-split route templates in main entrypoint', function () {
-        expectFile('./assets/my-app.js').matches('pods/index/template');
+        expectAudit
+          .module('./assets/my-app.js')
+          .resolves('./-embroider-amd-modules.js')
+          .toModule()
+          .withContents(contents => {
+            const [, objectName] = /"my-app\/pods\/index\/template": (amdMod\d+),/.exec(contents) ?? [];
+
+            return contents.includes(`import * as ${objectName} from "my-app\/pods\/index\/template.hbs";`);
+          }, 'pods/index/template import/export should be present in the virtual -embroider-amd-modules.js file');
       });
 
       test('has non-split routes in main entrypoint', function () {
@@ -501,7 +517,15 @@ splitScenarios
       });
 
       test('has non-split route templates in main entrypoint', function () {
-        expectFile('./assets/my-app.js').matches('routes/index/template');
+        expectAudit
+          .module('./assets/my-app.js')
+          .resolves('./-embroider-amd-modules.js')
+          .toModule()
+          .withContents(contents => {
+            const [, objectName] = /"my-app\/routes\/index\/template": (amdMod\d+),/.exec(contents) ?? [];
+
+            return contents.includes(`import * as ${objectName} from "my-app\/routes\/index\/template.hbs";`);
+          }, 'routes/index/template import/export should be present in the virtual -embroider-amd-modules.js file');
       });
 
       test('has non-split routes in main entrypoint', function () {
diff --git a/tests/scenarios/core-resolver-test.ts b/tests/scenarios/core-resolver-test.ts
index 23626b21b..425bca3aa 100644
--- a/tests/scenarios/core-resolver-test.ts
+++ b/tests/scenarios/core-resolver-test.ts
@@ -133,6 +133,7 @@ Scenarios.fromProject(() => new Project())
             ],
             amdModules: [],
             fastbootOnlyAmdModules: [],
+            testModules: [],
           };
 
           givenFiles({