diff --git a/tests/HasRevisionsTest.php b/tests/HasRevisionsTest.php
index 7b99261..5c49351 100644
--- a/tests/HasRevisionsTest.php
+++ b/tests/HasRevisionsTest.php
@@ -99,7 +99,7 @@ public function it_can_delete_all_revisions_of_a_record()
     public function it_can_create_a_revision_when_creating_the_record()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->enableRevisionOnCreate();
             }
@@ -114,7 +114,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_limit_the_number_of_revisions_a_record_can_have()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->limitRevisionsTo(5);
             }
@@ -134,7 +134,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_deletes_the_oldest_revisions_when_the_limit_is_achieved()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->limitRevisionsTo(5);
             }
@@ -154,7 +154,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_specify_only_certain_fields_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->fieldsToRevision('name', 'votes');
             }
@@ -176,7 +176,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_exclude_certain_fields_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->fieldsToNotRevision('name', 'votes');
             }
@@ -198,7 +198,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_include_timestamps_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->withTimestamps();
             }
@@ -217,7 +217,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_save_belongs_to_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('author');
             }
@@ -241,7 +241,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_stores_the_original_attribute_values_of_belongs_to_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('author');
             }
@@ -272,7 +272,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_rolls_back_belongs_to_relations_when_rolling_back_to_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('author');
             }
@@ -302,7 +302,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_save_has_one_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('reply');
             }
@@ -326,7 +326,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_stores_the_original_attribute_values_of_has_one_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('reply');
             }
@@ -354,7 +354,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_rolls_back_has_one_relations_when_rolling_back_to_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('reply');
             }
@@ -382,7 +382,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_removes_extra_created_has_one_relations_when_rolling_back_to_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('reply');
             }
@@ -409,7 +409,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_save_has_many_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('comments');
             }
@@ -439,7 +439,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_stores_the_original_attribute_values_of_has_many_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('comments');
             }
@@ -475,7 +475,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_rolls_back_has_many_relations_when_rolling_back_to_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('comments');
             }
@@ -509,7 +509,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_removes_extra_created_has_many_relations_when_rolling_back_to_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('comments');
             }
@@ -538,7 +538,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_can_save_belongs_to_many_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('tags');
             }
@@ -567,7 +567,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_stores_the_original_pivot_values_of_belongs_to_many_relations_when_creating_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('tags');
             }
@@ -589,7 +589,7 @@ public function getRevisionOptions() : RevisionOptions
     public function it_rolls_back_belongs_to_many_relations_when_rolling_back_to_a_revision()
     {
         $model = new class extends Post {
-            public function getRevisionOptions() : RevisionOptions
+            public function getRevisionOptions(): RevisionOptions
             {
                 return parent::getRevisionOptions()->relationsToRevision('tags');
             }