diff --git a/packages/language-service/test/diagnostics_spec.ts b/packages/language-service/test/diagnostics_spec.ts
index 6f2aa589c0..1bea06f6cd 100644
--- a/packages/language-service/test/diagnostics_spec.ts
+++ b/packages/language-service/test/diagnostics_spec.ts
@@ -246,30 +246,32 @@ describe('diagnostics', () => {
     expect(diags).toEqual([]);
   });
 
-  describe('in expression-cases.ts', () => {
-    it('should report access to an unknown field', () => {
-      const diags = ngLS.getSemanticDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
-      expect(diags).toContain(
-          `Identifier 'foo' is not defined. ` +
-          `The component declaration, template variable declarations, ` +
-          `and element references do not contain such a member`);
-    });
+  it('should report access to an unknown field', () => {
+    mockHost.override(TEST_TEMPLATE, `{{ foo }}`);
+    const diags = ngLS.getSemanticDiagnostics(TEST_TEMPLATE).map(d => d.messageText);
+    expect(diags).toContain(
+        `Identifier 'foo' is not defined. ` +
+        `The component declaration, template variable declarations, ` +
+        `and element references do not contain such a member`);
+  });
 
-    it('should report access to an unknown sub-field', () => {
-      const diags = ngLS.getSemanticDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
-      expect(diags).toContain(
-          `Identifier 'nam' is not defined. 'Person' does not contain such a member`);
-    });
+  it('should report access to an unknown sub-field', () => {
+    mockHost.override(TEST_TEMPLATE, `{{ hero.nam }}`);
+    const diags = ngLS.getSemanticDiagnostics(TEST_TEMPLATE).map(d => d.messageText);
+    expect(diags).toContain(
+        `Identifier 'nam' is not defined. 'Hero' does not contain such a member`);
+  });
 
-    it('should report access to a private member', () => {
-      const diags = ngLS.getSemanticDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
-      expect(diags).toContain(`Identifier 'myField' refers to a private member of the component`);
-    });
+  it('should report access to a private member', () => {
+    mockHost.override(TEST_TEMPLATE, `{{ myField }}`);
+    const diags = ngLS.getSemanticDiagnostics(TEST_TEMPLATE).map(d => d.messageText);
+    expect(diags).toContain(`Identifier 'myField' refers to a private member of the component`);
+  });
 
-    it('should report numeric operator errors', () => {
-      const diags = ngLS.getSemanticDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
-      expect(diags).toContain('Expected a number type');
-    });
+  it('should report numeric operator errors', () => {
+    mockHost.override(TEST_TEMPLATE, `{{ 'a' % 2 }}`);
+    const diags = ngLS.getSemanticDiagnostics(TEST_TEMPLATE).map(d => d.messageText);
+    expect(diags).toContain('Expected a number type');
   });
 
   describe('in ng-for-cases.ts', () => {
diff --git a/packages/language-service/test/project/app/expression-cases.ts b/packages/language-service/test/project/app/expression-cases.ts
deleted file mode 100644
index b8ebc80194..0000000000
--- a/packages/language-service/test/project/app/expression-cases.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-import {Component} from '@angular/core';
-
-export interface Person {
-  name: string;
-  age: number;
-}
-
-@Component({
-  template: '{{~{start-foo}foo~{end-foo}}}',
-})
-export class WrongFieldReference {
-  bar = 'bar';
-}
-
-@Component({
-  template: '{{~{start-nam}person.nam~{end-nam}}}',
-})
-export class WrongSubFieldReference {
-  person: Person = {name: 'Bob', age: 23};
-}
-
-@Component({
-  template: '{{~{start-myField}myField~{end-myField}}}',
-})
-export class PrivateReference {
-  private myField = 'My Field';
-}
-
-@Component({
-  template: '{{~{start-mod}"a" ~{end-mod}% 2}}',
-})
-export class ExpectNumericType {
-}
diff --git a/packages/language-service/test/project/app/main.ts b/packages/language-service/test/project/app/main.ts
index edd01e1289..27f0f8d17c 100644
--- a/packages/language-service/test/project/app/main.ts
+++ b/packages/language-service/test/project/app/main.ts
@@ -9,9 +9,7 @@
 import {CommonModule} from '@angular/common';
 import {NgModule} from '@angular/core';
 import {FormsModule} from '@angular/forms';
-
 import {AppComponent} from './app.component';
-import * as ExpressionCases from './expression-cases';
 import * as NgForCases from './ng-for-cases';
 import * as NgIfCases from './ng-if-cases';
 import * as ParsingCases from './parsing-cases';
@@ -20,10 +18,6 @@ import * as ParsingCases from './parsing-cases';
   imports: [CommonModule, FormsModule],
   declarations: [
     AppComponent,
-    ExpressionCases.ExpectNumericType,
-    ExpressionCases.PrivateReference,
-    ExpressionCases.WrongFieldReference,
-    ExpressionCases.WrongSubFieldReference,
     NgForCases.UnknownEven,
     NgForCases.UnknownPeople,
     NgForCases.UnknownTrackBy,
diff --git a/packages/language-service/test/project/app/parsing-cases.ts b/packages/language-service/test/project/app/parsing-cases.ts
index 3158b8a215..da5c203034 100644
--- a/packages/language-service/test/project/app/parsing-cases.ts
+++ b/packages/language-service/test/project/app/parsing-cases.ts
@@ -169,6 +169,7 @@ export class TemplateReference {
   birthday = new Date();
   readonlyHeroes: ReadonlyArray<Readonly<Hero>> = this.heroes;
   constNames = [{name: 'name'}] as const;
+  private myField = 'My Field';
 }
 
 @Component({
diff --git a/packages/language-service/test/ts_plugin_spec.ts b/packages/language-service/test/ts_plugin_spec.ts
index 97d93a253c..84817cf1ad 100644
--- a/packages/language-service/test/ts_plugin_spec.ts
+++ b/packages/language-service/test/ts_plugin_spec.ts
@@ -57,8 +57,8 @@ describe('plugin', () => {
     const compilerDiags = tsLS.getCompilerOptionsDiagnostics();
     expect(compilerDiags).toEqual([]);
     const sourceFiles = program.getSourceFiles().filter(f => !f.fileName.endsWith('.d.ts'));
-    // there are six .ts files in the test project
-    expect(sourceFiles.length).toBe(6);
+    // there are five .ts files in the test project
+    expect(sourceFiles.length).toBe(5);
     for (const {fileName} of sourceFiles) {
       const syntacticDiags = tsLS.getSyntacticDiagnostics(fileName);
       expect(syntacticDiags).toEqual([]);