diff --git a/tests/unit/UserBackendTest.php b/tests/unit/UserBackendTest.php
index 6325091aa..3bc4f50a4 100644
--- a/tests/unit/UserBackendTest.php
+++ b/tests/unit/UserBackendTest.php
@@ -117,10 +117,17 @@ public function testUpdateAttributesWithoutAttributes() {
 			->method('get')
 			->with('ExistingUser')
 			->willReturn($user);
-		$user
-			->expects($this->once())
-			->method('getEMailAddress')
-			->willReturn(null);
+		if (method_exists($user, 'getSystemEMailAddress')) {
+			$user
+				->expects($this->once())
+				->method('getSystemEMailAddress')
+				->willReturn(null);
+		} else {
+			$user
+				->expects($this->once())
+				->method('getEMailAddress')
+				->willReturn(null);
+		}
 		$user
 			->expects($this->never())
 			->method('setEMailAddress');
@@ -175,10 +182,17 @@ public function testUpdateAttributes() {
 			->method('get')
 			->with('ExistingUser')
 			->willReturn($user);
-		$user
-			->expects($this->once())
-			->method('getEMailAddress')
-			->willReturn('old@example.com');
+		if (method_exists($user, 'getSystemEMailAddress')) {
+			$user
+				->expects($this->once())
+				->method('getSystemEMailAddress')
+				->willReturn('old@example.com');
+		} else {
+			$user
+				->expects($this->once())
+				->method('getEMailAddress')
+				->willReturn('old@example.com');
+		}
 		$user
 			->expects($this->once())
 			->method('setEMailAddress')
@@ -263,10 +277,17 @@ public function testUpdateAttributesQuotaDefaultFallback() {
 			->method('get')
 			->with('ExistingUser')
 			->willReturn($user);
-		$user
-			->expects($this->once())
-			->method('getEMailAddress')
-			->willReturn('old@example.com');
+		if (method_exists($user, 'getSystemEMailAddress')) {
+			$user
+				->expects($this->once())
+				->method('getSystemEMailAddress')
+				->willReturn('old@example.com');
+		} else {
+			$user
+				->expects($this->once())
+				->method('getEMailAddress')
+				->willReturn('old@example.com');
+		}
 		$user
 			->expects($this->once())
 			->method('setEMailAddress')