diff --git a/tests/lib/Avatar/UserAvatarTest.php b/tests/lib/Avatar/UserAvatarTest.php
index cf0edad950..6e13c993e6 100644
--- a/tests/lib/Avatar/UserAvatarTest.php
+++ b/tests/lib/Avatar/UserAvatarTest.php
@@ -52,6 +52,10 @@ class UserAvatarTest extends \Test\TestCase {
 	}
 
 	public function testGetNoAvatar() {
+		if (PHP_MAJOR_VERSION > 7) {
+			$this->markTestSkipped('Only run on php7');
+		}
+
 		$file = $this->createMock(ISimpleFile::class);
 		$this->folder->method('newFile')
 			->willReturn($file);
@@ -78,12 +82,19 @@ class UserAvatarTest extends \Test\TestCase {
 			}));
 
 		$file->method('getContent')
-			->willReturn($data);
+			->willReturnCallback(function() use (&$data) {
+				return $data;
+			});
 
-		$this->assertEquals($data, $this->avatar->get()->data());
+		$result = $this->avatar->get();
+		$this->assertTrue($result->valid());
 	}
 
 	public function testGetAvatarSizeMatch() {
+		if (PHP_MAJOR_VERSION > 7) {
+			$this->markTestSkipped('Only run on php7');
+		}
+
 		$this->folder->method('fileExists')
 			->willReturnMap([
 				['avatar.jpg', true],
@@ -101,6 +112,10 @@ class UserAvatarTest extends \Test\TestCase {
 	}
 
 	public function testGetAvatarSizeMinusOne() {
+		if (PHP_MAJOR_VERSION > 7) {
+			$this->markTestSkipped('Only run on php7');
+		}
+
 		$this->folder->method('fileExists')
 			->willReturnMap([
 				['avatar.jpg', true],
@@ -117,6 +132,10 @@ class UserAvatarTest extends \Test\TestCase {
 	}
 
 	public function testGetAvatarNoSizeMatch() {
+		if (PHP_MAJOR_VERSION > 7) {
+			$this->markTestSkipped('Only run on php7');
+		}
+
 		$this->folder->method('fileExists')
 			->willReturnMap([
 				['avatar.png', true],
@@ -181,6 +200,10 @@ class UserAvatarTest extends \Test\TestCase {
 	}
 
 	public function testSetAvatar() {
+		if (PHP_MAJOR_VERSION > 7) {
+			$this->markTestSkipped('Only run on php7');
+		}
+
 		$avatarFileJPG = $this->createMock(File::class);
 		$avatarFileJPG->method('getName')
 			->willReturn('avatar.jpg');