diff --git a/fiduswriter/book/tests/helpers.py b/fiduswriter/book/tests/helpers.py
new file mode 100644
index 0000000..d851a97
--- /dev/null
+++ b/fiduswriter/book/tests/helpers.py
@@ -0,0 +1,15 @@
+from django.contrib.auth import get_user_model
+from book.models import Book
+
+
+def create_user(username, email, password):
+    User = get_user_model()
+    user = User.objects.create_user(
+        username=username, email=email, password=password
+    )
+    return user
+
+
+def create_book(user, title):
+    book = Book.objects.create(title=title, owner=user)
+    return book
diff --git a/fiduswriter/book/tests/test_book_template_save.py b/fiduswriter/book/tests/test_book_template_save.py
new file mode 100644
index 0000000..9fc896a
--- /dev/null
+++ b/fiduswriter/book/tests/test_book_template_save.py
@@ -0,0 +1,71 @@
+import os
+from django.test import TestCase, Client
+from django.core.files.uploadedfile import SimpleUploadedFile
+from django.urls import reverse
+from .helpers import create_user, create_book
+
+
+class BookTemplateSaveTest(TestCase):
+    def setUp(self):
+        self.client = Client()
+        self.user = create_user("testuser", "testuser@example.com", "password")
+        self.client.login(username="testuser@example.com", password="password")
+        self.book = create_book(self.user, "Test Book")
+
+    def test_add_odt_template_save(self):
+        # Prepare a mock ODT template file
+        current_dir = os.path.dirname(os.path.abspath(__file__))
+        template_path = os.path.join(current_dir, "uploads", "template.odt")
+
+        with open(template_path, "rb") as template_file:
+            odt_content = template_file.read()
+            mock_odt_file = SimpleUploadedFile(
+                "template.odt",
+                odt_content,
+                content_type="application/vnd.oasis.opendocument.text",
+            )
+
+        # Add ODT template to the book
+        response = self.client.post(
+            reverse("book_odt_template_save"),
+            {"id": self.book.id, "file": mock_odt_file},
+            HTTP_X_REQUESTED_WITH="XMLHttpRequest",  # Add this line to simulate an AJAX request
+        )
+
+        self.assertEqual(
+            response.status_code,
+            200,
+            f"Unexpected status code: {response.status_code}",
+        )
+        # Verify the template was added to the book
+        self.book.refresh_from_db()
+        self.assertIsNotNone(self.book.odt_template)
+
+    def test_add_docx_template_save(self):
+        # Prepare a mock DOCX template file
+        current_dir = os.path.dirname(os.path.abspath(__file__))
+        template_path = os.path.join(current_dir, "uploads", "template.docx")
+
+        with open(template_path, "rb") as template_file:
+            docx_content = template_file.read()
+            mock_docx_file = SimpleUploadedFile(
+                "template.docx",
+                docx_content,
+                content_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+            )
+
+        # Add DOCX template to the book
+        response = self.client.post(
+            reverse("book_docx_template_save"),
+            {"id": self.book.id, "file": mock_docx_file},
+            HTTP_X_REQUESTED_WITH="XMLHttpRequest",
+        )
+
+        self.assertEqual(
+            response.status_code,
+            200,
+            f"Unexpected status code: {response.status_code}",
+        )
+        # Verify the template was added to the book
+        self.book.refresh_from_db()
+        self.assertIsNotNone(self.book.docx_template)
diff --git a/fiduswriter/book/tests/uploads/template.docx b/fiduswriter/book/tests/uploads/template.docx
new file mode 100644
index 0000000..daffdd8
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diff --git a/fiduswriter/book/tests/uploads/template.odt b/fiduswriter/book/tests/uploads/template.odt
new file mode 100644
index 0000000..118f2cb
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