diff --git a/lib/tests/markdown_test.php b/lib/tests/markdown_test.php
index b564e8408e5..248e56981a4 100644
--- a/lib/tests/markdown_test.php
+++ b/lib/tests/markdown_test.php
@@ -15,7 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * Test markdown text format
+ * Test markdown text format.
  *
  * @package    core
  * @category   phpunit
@@ -43,24 +43,24 @@ class core_markdown_testcase extends basic_testcase {
     public function test_paragraphs() {
         $text = "one\n\ntwo";
         $result = "<p>one</p>\n\n<p>two</p>\n";
-        $this->assertEquals($result, markdown_to_html($text));
+        $this->assertSame($result, markdown_to_html($text));
     }
 
     public function test_headings() {
         $text = "Header 1\n====================\n\n## Header 2";
         $result = "<h1>Header 1</h1>\n\n<h2>Header 2</h2>\n";
-        $this->assertEquals($result, markdown_to_html($text));
+        $this->assertSame($result, markdown_to_html($text));
     }
 
     public function test_lists() {
         $text = "* one\n* two\n* three\n";
         $result = "<ul>\n<li>one</li>\n<li>two</li>\n<li>three</li>\n</ul>\n";
-        $this->assertEquals($result, markdown_to_html($text));
+        $this->assertSame($result, markdown_to_html($text));
     }
 
     public function test_links() {
         $text = "some [example link](http://example.com/)";
         $result = "<p>some <a href=\"http://example.com/\">example link</a></p>\n";
-        $this->assertEquals($result, markdown_to_html($text));
+        $this->assertSame($result, markdown_to_html($text));
     }
 }