diff --git a/Tests/test_file_mic.py b/Tests/test_file_mic.py
index 9a6f13ea3..8140342c0 100644
--- a/Tests/test_file_mic.py
+++ b/Tests/test_file_mic.py
@@ -41,6 +41,8 @@ def test_is_animated() -> None:
 def test_tell() -> None:
     with Image.open(TEST_FILE) as im:
         assert im.tell() == 0
+        im.seek(1)
+        assert im.tell() == 1
 
 
 def test_seek() -> None:
diff --git a/Tests/test_image_array.py b/Tests/test_image_array.py
index d7e6c562c..db4e56f5a 100644
--- a/Tests/test_image_array.py
+++ b/Tests/test_image_array.py
@@ -95,6 +95,10 @@ def test_fromarray_strides_without_tobytes() -> None:
     class Wrapper:
         def __init__(self, arr_params: dict[str, Any]) -> None:
             self.__array_interface__ = arr_params
+            self.data = numpy.zeros(arr_params['shape'], dtype=numpy.uint8).tobytes()
+
+        def tostring(self):
+            return self.data
 
     with pytest.raises(ValueError):
         wrapped = Wrapper({"shape": (1, 1), "strides": (1, 1)})
diff --git a/Tests/test_imageshow.py b/Tests/test_imageshow.py
index 4e9291fbb..523d695ad 100644
--- a/Tests/test_imageshow.py
+++ b/Tests/test_imageshow.py
@@ -94,3 +94,31 @@ def test_ipythonviewer() -> None:
 
     im = hopper()
     assert test_viewer.show(im) == 1
+
+def test_viewer_exceptions() -> None:
+    viewer = ImageShow.Viewer()
+
+    with pytest.raises(NotImplementedError):
+        viewer.show_image(Image.new("L", (1, 1)))
+
+    with pytest.raises(NotImplementedError):
+        viewer.save_image(Image.new("L", (1, 1)))
+
+def test_viewer_show_edge_cases() -> None:
+    class TestViewer(ImageShow.Viewer):
+        def show_image(self, image: Image.Image, **options: Any) -> bool:
+            self.methodCalled = True
+            return True
+
+    viewer = TestViewer()
+    ImageShow.register(viewer)
+
+    for mode in ["", "special characters", "a" * 1000]:
+        viewer.methodCalled = False
+        with hopper(mode) as im:
+            assert ImageShow.show(im)
+        assert viewer.methodCalled
+
+    # Restore original state
+    ImageShow._viewers.pop(0)
+    
\ No newline at end of file
diff --git a/Tests/test_uploader.py b/Tests/test_uploader.py
index d55ceb4be..e6427592f 100644
--- a/Tests/test_uploader.py
+++ b/Tests/test_uploader.py
@@ -1,15 +1,46 @@
 from __future__ import annotations
 
+import pytest
+from PIL import Image
+
 from .helper import assert_image_equal, assert_image_similar, hopper
 
+@pytest.fixture
+def result():
+    return hopper("P").convert("RGB")
 
-def check_upload_equal() -> None:
-    result = hopper("P").convert("RGB")
-    target = hopper("RGB")
+@pytest.fixture
+def target():
+    return hopper("RGB")
+
+def test_upload_equal(result, target):
     assert_image_equal(result, target)
 
+def test_upload_similar(result, target, epsilon):
+    assert_image_similar(result, target, epsilon)
 
-def check_upload_similar() -> None:
+@pytest.mark.parametrize("epsilon", [0, 1, 100])
+def test_upload_similar_parametrized(result, target, epsilon):
+    assert_image_similar(result, target, epsilon)
+
+def test_upload_equal_different_formats():
+    result = Image.open("Tests/images/hopper_webp.png").convert("RGB")
+    target = Image.open("Tests/images/hopper_webp.tif").convert("RGB")
+    assert_image_equal(result, target)
+
+def test_upload_equal_different_sizes():
+    result = hopper("P").resize((100, 100)).convert("RGB")
+    target = hopper("RGB").resize((200, 200))
+    assert_image_equal(result, target)
+
+def test_upload_not_similar():
     result = hopper("P").convert("RGB")
-    target = hopper("RGB")
-    assert_image_similar(result, target, 0)
+    target = Image.new("RGB", (100, 100), "white")
+    with pytest.raises(AssertionError):
+        assert_image_similar(result, target, 0)
+
+def test_upload_equal_different_modes():
+    result = hopper("L").convert("RGB")
+    target = hopper("1").convert("RGB")
+    assert_image_equal(result, target)
+    
\ No newline at end of file
diff --git a/boy meets evil.png b/boy meets evil.png
new file mode 100644
index 000000000..046a98a20
Binary files /dev/null and b/boy meets evil.png differ
diff --git a/display_image.py b/display_image.py
new file mode 100644
index 000000000..1c2543bb4
--- /dev/null
+++ b/display_image.py
@@ -0,0 +1,15 @@
+import time
+import matplotlib
+matplotlib.use('TkAgg')
+from PIL import Image
+import matplotlib.pyplot as plt
+
+# Open an image file
+img = Image.open('boy meets evil.png')
+
+# Display the image
+plt.imshow(img)
+plt.show()
+
+# Keep the script running for a while
+time.sleep(10)  # keeps the script running for 10 seconds
\ No newline at end of file