diff --git a/test/test_event_store.rb b/test/test_event_store.rb
index 1fde6fe..f37442a 100644
--- a/test/test_event_store.rb
+++ b/test/test_event_store.rb
@@ -6,10 +6,6 @@ module En57
   class TestEventStore < Minitest::Test
     cover EventStore
 
-    def credit_topped_up
-      @credit_topped_up ||= Event.new(type: "CreditsToppedUp")
-    end
-
     def test_append_event
       repository =
         Class
@@ -105,5 +101,11 @@ module En57
 
       assert_equal({ fail_if:, after: nil }, repository.kwargs)
     end
+
+    private
+
+    def credit_topped_up
+      @credit_topped_up ||= Event.new(type: "CreditsToppedUp")
+    end
   end
 end
diff --git a/test/test_integration.rb b/test/test_integration.rb
index 78d6c3a..360ccfb 100644
--- a/test/test_integration.rb
+++ b/test/test_integration.rb
@@ -14,14 +14,6 @@ module En57
       SERVER.shutdown
     end
 
-    def ids = @ids ||= Hash.new { |h, k| h[k] = SecureRandom.uuid_v7 }
-
-    def with_event_store =
-      yield EventStore.new(PgRepository.new(CONNECTION_URI, JsonSerializer.new))
-
-    def setup =
-      CONNECTION.exec("TRUNCATE TABLE tags, events RESTART IDENTITY CASCADE")
-
     def test_happy_path
       with_event_store do |event_store|
         events = [
@@ -228,5 +220,15 @@ module En57
         assert_equal(events.fetch_values(0, 2), (orders | prices).each.to_a)
       end
     end
+
+    private
+
+    def ids = @ids ||= Hash.new { |h, k| h[k] = SecureRandom.uuid_v7 }
+
+    def with_event_store =
+      yield EventStore.new(PgRepository.new(CONNECTION_URI, JsonSerializer.new))
+
+    def setup =
+      CONNECTION.exec("TRUNCATE TABLE tags, events RESTART IDENTITY CASCADE")
   end
 end
diff --git a/test/test_json_serializer.rb b/test/test_json_serializer.rb
index 162b5e0..671aff3 100644
--- a/test/test_json_serializer.rb
+++ b/test/test_json_serializer.rb
@@ -11,8 +11,6 @@ module En57
   class TestJsonSerializer < Minitest::Test
     cover JsonSerializer
 
-    def serializer = JsonSerializer.new
-
     class Example < Data.define(:name, :value, :serialized, :klass)
       NATIVE_TYPES = %w[
         String
@@ -69,5 +67,9 @@ module En57
     def test_empty_meta_for_native_payload
       assert_equal(%w[{"kaka":"dudu"} {}], serializer.dump("kaka" => "dudu"))
     end
+
+    private
+
+    def serializer = JsonSerializer.new
   end
 end
diff --git a/test/test_stress.rb b/test/test_stress.rb
index fa00685..5d01325 100644
--- a/test/test_stress.rb
+++ b/test/test_stress.rb
@@ -15,10 +15,6 @@ module En57
       SERVER.shutdown
     end
 
-    def setup
-      CONNECTION.exec("TRUNCATE TABLE tags, events RESTART IDENTITY CASCADE")
-    end
-
     def test_only_one_writer_can_consume_account_credits
       account_tag = "account:x"
       event_store.append(
@@ -77,6 +73,10 @@ module En57
 
     private
 
+    def setup
+      CONNECTION.exec("TRUNCATE TABLE tags, events RESTART IDENTITY CASCADE")
+    end
+
     def event_store
       @event_store ||=
         EventStore.new(PgRepository.new(CONNECTION_URI, JsonSerializer.new))