--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_rewrite_images.py	Mon Sep 15 11:44:09 2025 +0200
@@ -0,0 +1,15 @@
+import pymupdf
+import os
+
+scriptdir = os.path.dirname(__file__)
+
+
+def test_rewrite_images():
+    """Example for decreasing file size by more than 30%."""
+    filename = os.path.join(scriptdir, "resources", "test-rewrite-images.pdf")
+    doc = pymupdf.open(filename)
+    size0 = os.path.getsize(doc.name)
+    doc.rewrite_images(dpi_threshold=100, dpi_target=72, quality=33)
+    data = doc.tobytes(garbage=3, deflate=True)
+    size1 = len(data)
+    assert (1 - (size1 / size0)) > 0.3