diff --git a/test/decentralised_book_index/metadata/book_test.exs b/test/decentralised_book_index/metadata/book_test.exs
index 7960f94..7928d29 100644
--- a/test/decentralised_book_index/metadata/book_test.exs
+++ b/test/decentralised_book_index/metadata/book_test.exs
@@ -5,22 +5,14 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
 
   describe "books and registries relationship" do
     test "a new book get new registry by default" do
-      {:ok, author} = Metadata.create_author("Author", "An description")
-
-      author_roles = [
-        %{order: 1, author_id: author.id, role: ""}
-      ]
+      author_roles = author_roles()
 
       assert {:ok, book} = Metadata.create_book("Book", "1234567890", "An description", author_roles)
       assert book.book_editions_registry_id != nil
     end
 
     test "a new book belongs to a registry if specified" do
-      {:ok, author} = Metadata.create_author("Author", "An description")
-
-      author_roles = [
-        %{order: 1, author_id: author.id, role: ""}
-      ]
+      author_roles = author_roles()
 
       assert {:ok, registry} = Metadata.create_book_editions_registry()
       assert {:ok, book} = Metadata.create_book("Book", "1234567890", "An description", author_roles, registry.id)
@@ -28,11 +20,7 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
     end
 
     test "a new book to a registry via a related book record" do
-      {:ok, author} = Metadata.create_author("Author", "An description")
-
-      author_roles = [
-        %{order: 1, author_id: author.id, role: ""}
-      ]
+      author_roles = author_roles()
 
       {:ok, related_book} = Metadata.create_book("Book", "1234567890", "An description", author_roles)
 
@@ -43,11 +31,7 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
     end
 
     test "a new book to a registry via a empty related book record" do
-      {:ok, author} = Metadata.create_author("Author", "An description")
-
-      author_roles = [
-        %{order: 1, author_id: author.id, role: ""}
-      ]
+      author_roles = author_roles()
 
       assert {:error, _} =
         Metadata.add_book_to_related_editions_registry("Book2", "1234567891", "An description2", author_roles, nil)
@@ -56,11 +40,7 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
 
   describe "books alternatives names" do
     test "new book has no alternatives names" do
-      {:ok, author} = Metadata.create_author("Author", "An description")
-
-      author_roles = [
-        %{order: 1, author_id: author.id, role: ""}
-      ]
+      author_roles = author_roles()
 
       {:ok, book} = Metadata.create_book("Book", "1234567890", "An description", author_roles)
       assert {:ok, alternatives_names} = Metadata.get_book_alternative_editions(book)
@@ -68,11 +48,7 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
     end
 
     test "book has related book so they has one alternative name" do
-      {:ok, author} = Metadata.create_author("Author", "An description")
-
-      author_roles = [
-        %{order: 1, author_id: author.id, role: ""}
-      ]
+      author_roles = author_roles()
 
       {:ok, related_book} = Metadata.create_book("Book", "1234567890", "An description", author_roles)
 
diff --git a/test/support/data_case.ex b/test/support/data_case.ex
index 0aa98d5..d7ca407 100644
--- a/test/support/data_case.ex
+++ b/test/support/data_case.ex
@@ -24,6 +24,7 @@ defmodule DecentralisedBookIndex.DataCase do
       import Ecto.Changeset
       import Ecto.Query
       import DecentralisedBookIndex.DataCase
+      import DecentralisedBookIndex.Generators
     end
   end
 
diff --git a/test/support/generators.ex b/test/support/generators.ex
new file mode 100644
index 0000000..1533aa8
--- /dev/null
+++ b/test/support/generators.ex
@@ -0,0 +1,66 @@
+defmodule DecentralisedBookIndex.Generators do
+  @moduledoc "Generators for tests"
+
+  use Ash.Generator
+  alias DecentralisedBookIndex.Metadata
+
+  @doc """
+  Generates user changesets with the `:register_with_password` action.
+  """
+  def user(opts \\ []) do
+    changeset_generator(
+      DecentralisedBookIndex.Accounts.User,
+      :register_with_password,
+      defaults: [
+        # Generates unique values using an auto-incrementing sequence
+        # eg. `user1@example.com`, `user2@example.com`, etc.
+        email: sequence(:user_email, &"user#{&1}@example.com"),
+        password: "password",
+        password_confirmation: "password"
+      ],
+      overrides: opts,
+      authorize?: false
+    )
+  end
+
+  def author(opts \\ []) do
+    actor =
+      opts[:actor] ||
+        once(:default_actor, fn ->
+          generate(user())
+        end)
+
+    changeset_generator(
+      Metadata.Author,
+      :create,
+      defaults: [
+        name: sequence(:name, &"Author #{&1}"),
+        description: sequence(:name, &"Description #{&1}"),
+        author_alias_registry_id: nil
+      ],
+      overrides: opts,
+      actor: actor
+    )
+  end
+
+  @doc """
+  Generates a list of author roles.
+
+  Example:
+  > author_roles = author_roles()
+  """
+  def author_roles(opts \\ []) do
+    actor =
+      opts[:actor] ||
+        once(:default_actor, fn ->
+          generate(user())
+        end)
+
+    count =
+      opts[:count] || 2
+
+    for order <- 1..count do
+      %{order: order, author_id: generate(author(actor: actor)).id, role: ""}
+    end
+  end
+end