diff --git a/tests/src/Content/ItemTest.php b/tests/src/Content/ItemTest.php
index b635f8da88..d947eca3b4 100644
--- a/tests/src/Content/ItemTest.php
+++ b/tests/src/Content/ItemTest.php
@@ -25,6 +25,9 @@ use Friendica\Test\MockedTest;
 
 class ItemTest extends MockedTest
 {
+	/**
+	 * @doesNotPerformAssertions
+	 */
 	public function testDetermineCategoriesTerms()
 	{
 		static::markTestIncomplete('Test data needed.');
diff --git a/tests/src/Core/Cache/ArrayCacheTest.php b/tests/src/Core/Cache/ArrayCacheTest.php
index ada1fac654..c2e92806ce 100644
--- a/tests/src/Core/Cache/ArrayCacheTest.php
+++ b/tests/src/Core/Cache/ArrayCacheTest.php
@@ -37,6 +37,9 @@ class ArrayCacheTest extends MemoryCacheTest
 		parent::tearDown();
 	}
 
+	/**
+	 * @doesNotPerformAssertions
+	 */
 	public function testTTL()
 	{
 		// Array Cache doesn't support TTL
diff --git a/tests/src/Core/Cache/MemcacheCacheTest.php b/tests/src/Core/Cache/MemcacheCacheTest.php
index 738ff8100f..4947186ccb 100644
--- a/tests/src/Core/Cache/MemcacheCacheTest.php
+++ b/tests/src/Core/Cache/MemcacheCacheTest.php
@@ -66,6 +66,7 @@ class MemcacheCacheTest extends MemoryCacheTest
 	 * @small
 	 *
 	 * @dataProvider dataSimple
+	 * @doesNotPerformAssertions
 	 */
 	public function testGetAllKeys($value1, $value2, $value3)
 	{
diff --git a/tests/src/Core/Cache/MemcachedCacheTest.php b/tests/src/Core/Cache/MemcachedCacheTest.php
index 88de1ad41d..842e33d082 100644
--- a/tests/src/Core/Cache/MemcachedCacheTest.php
+++ b/tests/src/Core/Cache/MemcachedCacheTest.php
@@ -65,6 +65,7 @@ class MemcachedCacheTest extends MemoryCacheTest
 	 * @small
 	 *
 	 * @dataProvider dataSimple
+	 * @doesNotPerformAssertions
 	 */
 	public function testGetAllKeys($value1, $value2, $value3)
 	{
diff --git a/tests/src/Core/Lock/ArrayCacheLockTest.php b/tests/src/Core/Lock/ArrayCacheLockTest.php
index 6ddedfa438..11ea794c68 100644
--- a/tests/src/Core/Lock/ArrayCacheLockTest.php
+++ b/tests/src/Core/Lock/ArrayCacheLockTest.php
@@ -31,6 +31,9 @@ class ArrayCacheLockTest extends LockTest
 		return new CacheLock(new ArrayCache('localhost'));
 	}
 
+	/**
+	 * @doesNotPerformAssertions
+	 */
 	public function testLockTTL()
 	{
 		self::markTestSkipped("ArrayCache doesn't support TTL");
diff --git a/tests/src/Core/Lock/MemcacheCacheLockTest.php b/tests/src/Core/Lock/MemcacheCacheLockTest.php
index 97e0bfeb85..98266852f9 100644
--- a/tests/src/Core/Lock/MemcacheCacheLockTest.php
+++ b/tests/src/Core/Lock/MemcacheCacheLockTest.php
@@ -63,6 +63,7 @@ class MemcacheCacheLockTest extends LockTest
 
 	/**
 	 * @small
+	 * @doesNotPerformAssertions
 	 */
 	public function testGetLocks()
 	{
@@ -71,6 +72,7 @@ class MemcacheCacheLockTest extends LockTest
 
 	/**
 	 * @small
+	 * @doesNotPerformAssertions
 	 */
 	public function testGetLocksWithPrefix()
 	{
diff --git a/tests/src/Core/Lock/MemcachedCacheLockTest.php b/tests/src/Core/Lock/MemcachedCacheLockTest.php
index c655fdb593..67d3097fab 100644
--- a/tests/src/Core/Lock/MemcachedCacheLockTest.php
+++ b/tests/src/Core/Lock/MemcachedCacheLockTest.php
@@ -60,11 +60,17 @@ class MemcachedCacheLockTest extends LockTest
 		return $lock;
 	}
 
+	/**
+	 * @doesNotPerformAssertions
+	 */
 	public function testGetLocks()
 	{
 		static::markTestIncomplete('Race condition because of too fast getLocks() which uses a workaround');
 	}
 
+	/**
+	 * @doesNotPerformAssertions
+	 */
 	public function testGetLocksWithPrefix()
 	{
 		static::markTestIncomplete('Race condition because of too fast getLocks() which uses a workaround');
diff --git a/tests/src/Core/Lock/SemaphoreLockTest.php b/tests/src/Core/Lock/SemaphoreLockTest.php
index ca5d0af7db..87d8b2cd2f 100644
--- a/tests/src/Core/Lock/SemaphoreLockTest.php
+++ b/tests/src/Core/Lock/SemaphoreLockTest.php
@@ -59,6 +59,9 @@ class SemaphoreLockTest extends LockTest
 		return new SemaphoreLock();
 	}
 
+	/**
+	 * @doesNotPerformAssertions
+	 */
 	public function testLockTTL()
 	{
 		self::markTestSkipped("Semaphore doesn't work with TTL");
diff --git a/tests/src/Util/Emailer/MailBuilderTest.php b/tests/src/Util/Emailer/MailBuilderTest.php
index 933203d156..88452a9dab 100644
--- a/tests/src/Util/Emailer/MailBuilderTest.php
+++ b/tests/src/Util/Emailer/MailBuilderTest.php
@@ -93,6 +93,7 @@ class MailBuilderTest extends MockedTest
 	 * Test if the builder can create full rendered emails
 	 *
 	 * @todo Create test once "Renderer" and "BBCode" are dynamic
+	 * @doesNotPerformAssertions
 	 */
 	public function testBuilderWithNonRawEmail()
 	{
diff --git a/tests/src/Util/Logger/StreamLoggerTest.php b/tests/src/Util/Logger/StreamLoggerTest.php
index 7a3315e7ef..f6bf3313a9 100644
--- a/tests/src/Util/Logger/StreamLoggerTest.php
+++ b/tests/src/Util/Logger/StreamLoggerTest.php
@@ -193,6 +193,7 @@ class StreamLoggerTest extends AbstractLoggerTest
 
 	/**
 	 * Test a relative path
+	 * @doesNotPerformAssertions
 	 */
 	public function testRealPath()
 	{