diff --git a/spec/fabricators/account_domain_block_fabricator.rb b/spec/fabricators/account_domain_block_fabricator.rb
index fbbddadd5d279bcb7872f94f6cdbf1ca922d0e7d..2ad4b67a99bb4b3e7e2e112226f8b0340fb88a6f 100644
--- a/spec/fabricators/account_domain_block_fabricator.rb
+++ b/spec/fabricators/account_domain_block_fabricator.rb
@@ -1,4 +1,4 @@
 Fabricator(:account_domain_block) do
-  account_id 1
-  domain     "MyString"
+  account
+  domain 'example.com'
 end
diff --git a/spec/fabricators/account_fabricator.rb b/spec/fabricators/account_fabricator.rb
index 68a75807957d30e2a5039ed877de5983d4485db7..446f8ea27931f4aad5190173e7faa9537a8c65ee 100644
--- a/spec/fabricators/account_fabricator.rb
+++ b/spec/fabricators/account_fabricator.rb
@@ -1,4 +1,4 @@
 Fabricator(:account) do
-  username { Faker::Internet.user_name(nil, %w(_)) }
+  username { sequence(:username) { |i| "#{Faker::Internet.user_name(nil, %w(_))}#{i}" } }
   last_webfingered_at { Time.now.utc }
 end
diff --git a/spec/fabricators/preview_card_fabricator.rb b/spec/fabricators/preview_card_fabricator.rb
index 448a94e7ed873e2e71988ef70e5b03bb54088e7c..15b33815c6d8fdb17155653f332fcc4296b82b07 100644
--- a/spec/fabricators/preview_card_fabricator.rb
+++ b/spec/fabricators/preview_card_fabricator.rb
@@ -1,5 +1,4 @@
 Fabricator(:preview_card) do
-  status_id 1
-  url       "MyString"
-  html      "MyText"
+  status
+  url 'http://example.com'
 end
diff --git a/spec/fabricators/tag_fabricator.rb b/spec/fabricators/tag_fabricator.rb
index d83040990978c06dbd8dededc773ef4dce3c7cc5..33d57c9281f014f73c9ed00a77f8628785c75819 100644
--- a/spec/fabricators/tag_fabricator.rb
+++ b/spec/fabricators/tag_fabricator.rb
@@ -1,3 +1,3 @@
 Fabricator(:tag) do
-  name "MyString"
+  name { sequence(:hashtag) { |i| "#{Faker::Lorem.word}#{i}" } }
 end
diff --git a/spec/fabricators/user_fabricator.rb b/spec/fabricators/user_fabricator.rb
index 16b3b1f6f659362179ed1931e07b327d976f4903..cf51fe81d0e6da68cc972c2eadb788bdc957fc67 100644
--- a/spec/fabricators/user_fabricator.rb
+++ b/spec/fabricators/user_fabricator.rb
@@ -1,6 +1,6 @@
 Fabricator(:user) do
   account
-  email        { Faker::Internet.email }
+  email        { sequence(:email) { |i| "#{i}#{Faker::Internet.email}" } }
   password     "123456789"
   confirmed_at { Time.now }
 end