diff --git a/docs/installation.rst b/docs/installation.rst
index 59dbc3f88..f4c01d2a5 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -269,6 +269,8 @@ Using with Pyodide
 See :doc:`pyodide`.
 
 
+.. _installation_ocr:
+
 Enabling Integrated OCR Support
 ---------------------------------------------------------
 
diff --git a/docs/recipes-ocr.rst b/docs/recipes-ocr.rst
index 32cd50934..fca4455c6 100644
--- a/docs/recipes-ocr.rst
+++ b/docs/recipes-ocr.rst
@@ -18,7 +18,7 @@ OCR - Optical Character Recognition
 
 |PyMuPDF| has integrated support for OCR (Optical Character Recognition). It is possible to use OCR for both, images (via the :ref:`Pixmap` class) and for document pages.
 
-The feature is currently based on Tesseract-OCR which must be installed as a separate application -- see the installation chapter.
+The feature is currently based on Tesseract-OCR which must be installed as a separate application -- see the :ref:`installation_ocr`.
 
 How to OCR an Image 
 --------------------
diff --git a/tests/conftest.py b/tests/conftest.py
index e11553859..3f41d9943 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -42,6 +42,8 @@ def get_fds():
     pymupdf._log_items_clear()
     pymupdf._log_items_active(True)
     
+    JM_annot_id_stem = pymupdf.JM_annot_id_stem
+    
     # Run the test.
     rep = yield
     
@@ -57,6 +59,9 @@ def get_fds():
     log_items = pymupdf._log_items()
     assert not log_items, f'log() was called; {len(log_items)=}.'
     
+    assert pymupdf.JM_annot_id_stem == JM_annot_id_stem, \
+            f'pymupdf.JM_annot_id_stem has changed from {JM_annot_id_stem!r} to {pymupdf.JM_annot_id_stem!r}'
+    
     if platform.system() == 'Linux':
         # Show detailed information about leaked fds.
         open_fds_after, open_fds_after_l = get_fds()
diff --git a/tests/test_annots.py b/tests/test_annots.py
index 973701b9e..882b26692 100644
--- a/tests/test_annots.py
+++ b/tests/test_annots.py
@@ -10,8 +10,6 @@
 import gentle_compare
 
 
-pymupdf.TOOLS.set_annot_stem("jorj")
-
 red = (1, 0, 0)
 blue = (0, 0, 1)
 gold = (1, 1, 0)
@@ -226,38 +224,46 @@ def test_1645():
     '''
     Test fix for #1645.
     '''
-    path_in = os.path.abspath( f'{__file__}/../resources/symbol-list.pdf')
-
-    if pymupdf.mupdf_version_tuple >= (1, 26):
-        path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.26.pdf')
-    elif pymupdf.mupdf_version_tuple >= (1, 25):
-        path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.25.pdf')
-    elif pymupdf.mupdf_version_tuple >= (1, 24, 2):
-        path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.24.2.pdf')
-    else:
-        path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.24.pdf')
-    path_out = os.path.abspath( f'{__file__}/../test_1645_out.pdf')
-    doc = pymupdf.open(path_in)
-    page = doc[0]
-    page_bounds = page.bound()
-    annot_loc = pymupdf.Rect(page_bounds.x0, page_bounds.y0, page_bounds.x0 + 75, page_bounds.y0 + 15)
-    # Check type of page.derotation_matrix - this is #2911.
-    assert isinstance(page.derotation_matrix, pymupdf.Matrix), \
-            f'Bad type for page.derotation_matrix: {type(page.derotation_matrix)=} {page.derotation_matrix=}.'
-    page.add_freetext_annot(
-            annot_loc * page.derotation_matrix,
-            "TEST",
-            fontsize=18,
-            fill_color=pymupdf.utils.getColor("FIREBRICK1"),
-            rotate=page.rotation,
-            )
-    doc.save(path_out, garbage=1, deflate=True, no_new_id=True)
-    print(f'Have created {path_out}. comparing with {path_expected}.')
-    with open( path_out, 'rb') as f:
-        out = f.read()
-    with open( path_expected, 'rb') as f:
-        expected = f.read()
-    assert out == expected, f'Files differ: {path_out} {path_expected}'
+    # The expected output files assume annot_stem is 'jorj'. We need to always
+    # restore this before returning (this is checked by conftest.py).
+    annot_stem = pymupdf.JM_annot_id_stem
+    pymupdf.TOOLS.set_annot_stem('jorj')
+    try:
+        path_in = os.path.abspath( f'{__file__}/../resources/symbol-list.pdf')
+
+        if pymupdf.mupdf_version_tuple >= (1, 26):
+            path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.26.pdf')
+        elif pymupdf.mupdf_version_tuple >= (1, 25):
+            path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.25.pdf')
+        elif pymupdf.mupdf_version_tuple >= (1, 24, 2):
+            path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.24.2.pdf')
+        else:
+            path_expected = os.path.abspath( f'{__file__}/../../tests/resources/test_1645_expected_1.24.pdf')
+        path_out = os.path.abspath( f'{__file__}/../test_1645_out.pdf')
+        doc = pymupdf.open(path_in)
+        page = doc[0]
+        page_bounds = page.bound()
+        annot_loc = pymupdf.Rect(page_bounds.x0, page_bounds.y0, page_bounds.x0 + 75, page_bounds.y0 + 15)
+        # Check type of page.derotation_matrix - this is #2911.
+        assert isinstance(page.derotation_matrix, pymupdf.Matrix), \
+                f'Bad type for page.derotation_matrix: {type(page.derotation_matrix)=} {page.derotation_matrix=}.'
+        page.add_freetext_annot(
+                annot_loc * page.derotation_matrix,
+                "TEST",
+                fontsize=18,
+                fill_color=pymupdf.utils.getColor("FIREBRICK1"),
+                rotate=page.rotation,
+                )
+        doc.save(path_out, garbage=1, deflate=True, no_new_id=True)
+        print(f'Have created {path_out}. comparing with {path_expected}.')
+        with open( path_out, 'rb') as f:
+            out = f.read()
+        with open( path_expected, 'rb') as f:
+            expected = f.read()
+        assert out == expected, f'Files differ: {path_out} {path_expected}'
+    finally:
+        # Restore annot_stem.
+        pymupdf.TOOLS.set_annot_stem(annot_stem)
 
 def test_1824():
     '''
diff --git a/tests/test_toc.py b/tests/test_toc.py
index 198fe62ee..bad82c7ef 100644
--- a/tests/test_toc.py
+++ b/tests/test_toc.py
@@ -187,10 +187,10 @@ def test_3347():
         })
 
     links_expected = [
-            (0, {'kind': 1, 'xref': 11, 'from': pymupdf.Rect(10.0, 20.0, 50.0, 40.0), 'page': 0, 'to': pymupdf.Point(300.0, 350.0), 'zoom': 0.0, 'id': 'jorj-L0'}),
-            (0, {'kind': 1, 'xref': 12, 'from': pymupdf.Rect(300.0, 350.0, 400.0, 450.0), 'page': 1, 'to': pymupdf.Point(20.0, 30.0), 'zoom': 0.0, 'id': 'jorj-L1'}),
-            (1, {'kind': 1, 'xref': 13, 'from': pymupdf.Rect(20.0, 30.0, 40.0, 50.0), 'page': 1, 'to': pymupdf.Point(350.0, 300.0), 'zoom': 0.0, 'id': 'jorj-L0'}),
-            (1, {'kind': 1, 'xref': 14, 'from': pymupdf.Rect(350.0, 300.0, 450.0, 400.0), 'page': 0, 'to': pymupdf.Point(10.0, 20.0), 'zoom': 0.0, 'id': 'jorj-L1'}),
+            (0, {'kind': 1, 'xref': 11, 'from': pymupdf.Rect(10.0, 20.0, 50.0, 40.0), 'page': 0, 'to': pymupdf.Point(300.0, 350.0), 'zoom': 0.0, 'id': 'fitz-L0'}),
+            (0, {'kind': 1, 'xref': 12, 'from': pymupdf.Rect(300.0, 350.0, 400.0, 450.0), 'page': 1, 'to': pymupdf.Point(20.0, 30.0), 'zoom': 0.0, 'id': 'fitz-L1'}),
+            (1, {'kind': 1, 'xref': 13, 'from': pymupdf.Rect(20.0, 30.0, 40.0, 50.0), 'page': 1, 'to': pymupdf.Point(350.0, 300.0), 'zoom': 0.0, 'id': 'fitz-L0'}),
+            (1, {'kind': 1, 'xref': 14, 'from': pymupdf.Rect(350.0, 300.0, 450.0, 400.0), 'page': 0, 'to': pymupdf.Point(10.0, 20.0), 'zoom': 0.0, 'id': 'fitz-L1'}),
             ]
 
     path = os.path.normpath(f'{__file__}/../../tests/test_3347_out.pdf')
@@ -264,7 +264,7 @@ def test_3400():
         print(f'Saved to {path=}.')
         
         links_expected = [
-                (1, {'kind': 1, 'xref': 1120, 'from': pymupdf.Rect(10.0, 10.0, 100.0, 50.0), 'page': 0, 'to': pymupdf.Point(187.5, 472.5), 'zoom': 0.0, 'id': 'jorj-L0'})
+                (1, {'kind': 1, 'xref': 1120, 'from': pymupdf.Rect(10.0, 10.0, 100.0, 50.0), 'page': 0, 'to': pymupdf.Point(187.5, 472.5), 'zoom': 0.0, 'id': 'fitz-L0'})
                 ]
 
         links_actual = list()