diff --git a/spec/factories/groups.rb b/spec/factories/groups.rb
new file mode 100644
index 0000000..3bc1937
--- /dev/null
+++ b/spec/factories/groups.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :group do
+    number { 0 }
+  end
+end
diff --git a/spec/factories/matches.rb b/spec/factories/matches.rb
new file mode 100644
index 0000000..bc6be53
--- /dev/null
+++ b/spec/factories/matches.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :match do
+  end
+end
diff --git a/spec/factories/scores.rb b/spec/factories/scores.rb
new file mode 100644
index 0000000..830d779
--- /dev/null
+++ b/spec/factories/scores.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :score do
+    score { 0 }
+  end
+end
diff --git a/spec/factories/stages.rb b/spec/factories/stages.rb
new file mode 100644
index 0000000..870434e
--- /dev/null
+++ b/spec/factories/stages.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :stage do
+  end
+end