diff --git a/test/unit_tests/conftest.py b/test/unit_tests/conftest.py
index d9a702c..611cc3f 100644
--- a/test/unit_tests/conftest.py
+++ b/test/unit_tests/conftest.py
@@ -1,5 +1,6 @@
 import random
 import tempfile
+from itertools import starmap
 from operator import itemgetter
 
 import fpdf
@@ -12,6 +13,7 @@ from image_prediction.classifier.image_classifier import ImageClassifier
 from image_prediction.estimator.adapter.adapters.keras import KerasEstimatorAdapter
 from image_prediction.estimator.adapter.adapters.mock import EstimatorMock, EstimatorAdapterMock
 from image_prediction.exceptions import UnknownEstimatorAdapter, UnknownImageExtractor
+from image_prediction.image_extractor.extractor import ImageMetadataPair
 from image_prediction.image_extractor.extractors.mock import ImageExtractorMock
 from image_prediction.image_extractor.extractors.parsable import ParsablePDFImageExtractor
 
@@ -161,32 +163,41 @@ def metadata(images):
 
 
 @pytest.fixture
-def pdf(images, metadata):
+def image_metadata_pairs(images, metadata):
+    return list(starmap(ImageMetadataPair, zip(images, metadata)))
 
-    def add_image(image, metadata):
 
-        def fewer_pages_then_required():
-            return metadata["page_idx"] > pdf.page - 1
-
-        def add_image_to_last_page():
-            x, y, w, h = itemgetter("x1", "y1", "width", "height")(metadata)
-
-            with tempfile.NamedTemporaryFile(suffix=".png") as temp_image:
-                image.save(temp_image.name)
-                pdf.image(temp_image.name, x=x, y=y, w=w, h=h)
-
-        while fewer_pages_then_required():
-            pdf.add_page()
-
-        add_image_to_last_page()
-
-    def pdf_object_to_actual_pdf():
-        return pdf.output(dest="S").encode("latin1")
+@pytest.fixture
+def pdf(image_metadata_pairs):
 
     pdf = fpdf.FPDF(unit="pt")
-    pdf.add_page()
 
-    for image, metadata in zip(images, metadata):
-        add_image(image, metadata)
+    for pair in image_metadata_pairs:
+        add_image(pdf, pair)
 
-    return pdf_object_to_actual_pdf()
+    return pdf_object_to_actual_pdf(pdf)
+
+
+def add_image(pdf, image_metadata_pair):
+
+    while fewer_pages_then_required(image_metadata_pair.metadata["page_idx"], pdf):
+        pdf.add_page()
+
+    add_image_to_last_page(pdf, image_metadata_pair)
+
+
+def fewer_pages_then_required(page_idx, pdf):
+    return page_idx > pdf.page - 1
+
+
+def pdf_object_to_actual_pdf(pdf):
+    return pdf.output(dest="S").encode("latin1")
+
+
+def add_image_to_last_page(pdf, image_metadata_pair):
+    image, metadata = image_metadata_pair
+    x, y, w, h = itemgetter("x1", "y1", "width", "height")(metadata)
+
+    with tempfile.NamedTemporaryFile(suffix=".png") as temp_image:
+        image.save(temp_image.name)
+        pdf.image(temp_image.name, x=x, y=y, w=w, h=h)