1 files changed, 6 insertions, 6 deletions
diff --git a/tests/lib/Command/Integrity/SignCoreTest.php b/tests/lib/Command/Integrity/SignCoreTest.php
index 66227322dda..efff6da2f95 100644
--- a/tests/lib/Command/Integrity/SignCoreTest.php
+++ b/tests/lib/Command/Integrity/SignCoreTest.php
@@ -48,7 +48,7 @@ class SignCoreTest extends TestCase {
 		$outputInterface
 			->expects($this->any())
 			->method('writeln')
-			->willReturnCallback(function (string $message) {
+			->willReturnCallback(function (string $message): void {
 				$this->assertEquals('--privateKey, --certificate and --path are required.', $message);
 			});
 
@@ -71,7 +71,7 @@ class SignCoreTest extends TestCase {
 		$outputInterface
 			->expects($this->any())
 			->method('writeln')
-			->willReturnCallback(function (string $message) {
+			->willReturnCallback(function (string $message): void {
 				$this->assertEquals('--privateKey, --certificate and --path are required.', $message);
 			});
 
@@ -100,7 +100,7 @@ class SignCoreTest extends TestCase {
 		$outputInterface
 			->expects($this->any())
 			->method('writeln')
-			->willReturnCallback(function (string $message) {
+			->willReturnCallback(function (string $message): void {
 				$this->assertEquals('Private key "privateKey" does not exists.', $message);
 			});
 
@@ -131,7 +131,7 @@ class SignCoreTest extends TestCase {
 		$outputInterface
 			->expects($this->any())
 			->method('writeln')
-			->willReturnCallback(function (string $message) {
+			->willReturnCallback(function (string $message): void {
 				$this->assertEquals('Certificate "certificate" does not exists.', $message);
 			});
 
@@ -167,7 +167,7 @@ class SignCoreTest extends TestCase {
 		$outputInterface
 			->expects($this->any())
 			->method('writeln')
-			->willReturnCallback(function (string $message) {
+			->willReturnCallback(function (string $message): void {
 				$this->assertEquals('Error: My exception message', $message);
 			});
 
@@ -202,7 +202,7 @@ class SignCoreTest extends TestCase {
 		$outputInterface
 			->expects($this->any())
 			->method('writeln')
-			->willReturnCallback(function (string $message) {
+			->willReturnCallback(function (string $message): void {
 				$this->assertEquals('Successfully signed "core"', $message);
 			});