diff --git a/extensions/css-language-features/server/src/test/completion.test.ts b/extensions/css-language-features/server/src/test/completion.test.ts
index 55eb64d9789..ec336448a50 100644
--- a/extensions/css-language-features/server/src/test/completion.test.ts
+++ b/extensions/css-language-features/server/src/test/completion.test.ts
@@ -24,10 +24,10 @@ suite('Completions', () => {
 			return completion.label === expected.label;
 		});
 
-		assert.equal(matches.length, 1, `${expected.label} should only existing once: Actual: ${completions.items.map(c => c.label).join(', ')}`);
+		assert.strictEqual(matches.length, 1, `${expected.label} should only existing once: Actual: ${completions.items.map(c => c.label).join(', ')}`);
 		let match = matches[0];
 		if (expected.resultText && TextEdit.is(match.textEdit)) {
-			assert.equal(TextDocument.applyEdits(document, [match.textEdit]), expected.resultText);
+			assert.strictEqual(TextDocument.applyEdits(document, [match.textEdit]), expected.resultText);
 		}
 	};
 
@@ -50,7 +50,7 @@ suite('Completions', () => {
 		let list = await cssLanguageService.doComplete2(document, position, stylesheet, context);
 
 		if (expected.count) {
-			assert.equal(list.items.length, expected.count);
+			assert.strictEqual(list.items.length, expected.count);
 		}
 		if (expected.items) {
 			for (let item of expected.items) {
diff --git a/extensions/css-language-features/server/src/test/links.test.ts b/extensions/css-language-features/server/src/test/links.test.ts
index f67b5e92f25..bc4c6db6477 100644
--- a/extensions/css-language-features/server/src/test/links.test.ts
+++ b/extensions/css-language-features/server/src/test/links.test.ts
@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 import 'mocha';
 import * as assert from 'assert';
-import { URI }  from 'vscode-uri';
+import { URI } from 'vscode-uri';
 import { resolve } from 'path';
 import { TextDocument, DocumentLink } from 'vscode-languageserver-types';
 import { WorkspaceFolder } from 'vscode-languageserver-protocol';
@@ -26,10 +26,10 @@ suite('Links', () => {
 			return document.offsetAt(link.range.start) === expected.offset;
 		});
 
-		assert.equal(matches.length, 1, `${expected.offset} should only existing once: Actual: ${links.map(l => document.offsetAt(l.range.start)).join(', ')}`);
+		assert.strictEqual(matches.length, 1, `${expected.offset} should only existing once: Actual: ${links.map(l => document.offsetAt(l.range.start)).join(', ')}`);
 		let match = matches[0];
-		assert.equal(document.getText(match.range), expected.value);
-		assert.equal(match.target, expected.target);
+		assert.strictEqual(document.getText(match.range), expected.value);
+		assert.strictEqual(match.target, expected.target);
 	};
 
 	async function assertLinks(value: string, expected: ItemDescription[], testUri: string, workspaceFolders?: WorkspaceFolder[], lang: string = 'css'): Promise<void> {
@@ -47,7 +47,7 @@ suite('Links', () => {
 		const stylesheet = cssLanguageService.parseStylesheet(document);
 		let links = await cssLanguageService.findDocumentLinks2(document, stylesheet, context)!;
 
-		assert.equal(links.length, expected.length);
+		assert.strictEqual(links.length, expected.length);
 
 		for (let item of expected) {
 			assertLink(links, item, document);