diff --git a/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php b/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php
index 9f48a13..5c3aacf 100644
--- a/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php
+++ b/core/modules/system/src/Tests/Entity/EntityCacheTagsTestBase.php
@@ -383,9 +383,9 @@ public function testReferencedEntity() {
     $this->verifyPageCache($referencing_entity_url, 'MISS');
 
     // Verify a cache hit, but also the presence of the correct cache tags.
-    $expectedTags = Cache::mergeTags($referencing_entity_cache_tags, $page_cache_tags);
-    $expectedTags = Cache::mergeTags($expectedTags, $page_cache_tags_referencing_entity);
-    $this->verifyPageCache($referencing_entity_url, 'HIT', $expectedTags);
+    $expected_tags = Cache::mergeTags($referencing_entity_cache_tags, $page_cache_tags);
+    $expected_tags = Cache::mergeTags($expected_tags, $page_cache_tags_referencing_entity);
+    $this->verifyPageCache($referencing_entity_url, 'HIT', $expected_tags);
 
     // Also verify the existence of an entity render cache entry.
     $cache_keys = ['entity_view', 'entity_test', $this->referencingEntity->id(), 'full'];
@@ -417,9 +417,9 @@ public function testReferencedEntity() {
     $this->verifyPageCache($listing_url, 'MISS');
 
     // Verify a cache hit, but also the presence of the correct cache tags.
-    $expectedTags = Cache::mergeTags($referencing_entity_cache_tags, $page_cache_tags);
-    $expectedTags = Cache::mergeTags($expectedTags, $page_cache_tags_referencing_entity);
-    $this->verifyPageCache($listing_url, 'HIT', $expectedTags);
+    $expected_tags = Cache::mergeTags($referencing_entity_cache_tags, $page_cache_tags);
+    $expected_tags = Cache::mergeTags($expected_tags, $page_cache_tags_referencing_entity);
+    $this->verifyPageCache($listing_url, 'HIT', $expected_tags);
 
     $this->pass("Test empty listing.", 'Debug');
     // Prime the page cache for the empty listing.
diff --git a/core/modules/tracker/src/Tests/TrackerTest.php b/core/modules/tracker/src/Tests/TrackerTest.php
index 4a3ac34..3cb4186 100644
--- a/core/modules/tracker/src/Tests/TrackerTest.php
+++ b/core/modules/tracker/src/Tests/TrackerTest.php
@@ -79,9 +79,9 @@ function testTrackerAll() {
     // Assert cache contexts, specifically the pager and node access contexts.
     $this->assertCacheContexts(['languages:language_interface', 'theme', 'url.query_args.pagers:0', 'user.node_grants:view', 'user.permissions']);
     // Assert cache tags for the visible node and node list cache tag.
-    $expectedTags = Cache::mergeTags($published->getCacheTags(), $published->getOwner()->getCacheTags());
-    $expectedTags = Cache::mergeTags($expectedTags, ['node_list', 'rendered']);
-    $this->assertCacheTags($expectedTags);
+    $expected_tags = Cache::mergeTags($published->getCacheTags(), $published->getOwner()->getCacheTags());
+    $expected_tags = Cache::mergeTags($expected_tags, ['node_list', 'rendered']);
+    $this->assertCacheTags($expected_tags);
 
     // Delete a node and ensure it no longer appears on the tracker.
     $published->delete();