diff --git a/Tests/test_file_apng.py b/Tests/test_file_apng.py
index b9918c22d..bda3f8089 100644
--- a/Tests/test_file_apng.py
+++ b/Tests/test_file_apng.py
@@ -674,6 +674,10 @@ def test_save_all_progress() -> None:
     progress = []
 
     def callback(state):
+        if state["image_filename"]:
+            state["image_filename"] = (
+                state["image_filename"].replace("\\", "/").split("Tests/images/")[-1]
+            )
         progress.append(state)
 
     Image.new("RGB", (1, 1)).save(out, "PNG", save_all=True, progress=callback)
@@ -700,7 +704,7 @@ def test_save_all_progress() -> None:
         expected.append(
             {
                 "image_index": i,
-                "image_filename": "Tests/images/apng/single_frame.png",
+                "image_filename": "apng/single_frame.png",
                 "completed_frames": i + 1,
                 "total_frames": 7,
             }
@@ -709,7 +713,7 @@ def test_save_all_progress() -> None:
         expected.append(
             {
                 "image_index": 2,
-                "image_filename": "Tests/images/apng/delay.png",
+                "image_filename": "apng/delay.png",
                 "completed_frames": i + 3,
                 "total_frames": 7,
             }
diff --git a/Tests/test_file_gif.py b/Tests/test_file_gif.py
index 9ab843ec0..f38b25886 100644
--- a/Tests/test_file_gif.py
+++ b/Tests/test_file_gif.py
@@ -297,6 +297,10 @@ def test_save_all_progress():
     progress = []
 
     def callback(state):
+        if state["image_filename"]:
+            state["image_filename"] = (
+                state["image_filename"].replace("\\", "/").split("Tests/images/")[-1]
+            )
         progress.append(state)
 
     Image.new("RGB", (1, 1)).save(out, "GIF", save_all=True, progress=callback)
@@ -328,7 +332,7 @@ def test_save_all_progress():
         expected.append(
             {
                 "image_index": 1,
-                "image_filename": "Tests/images/chi.gif",
+                "image_filename": "chi.gif",
                 "completed_frames": i + 2,
                 "total_frames": 32,
             }
diff --git a/Tests/test_file_mpo.py b/Tests/test_file_mpo.py
index f7e82addf..e6d9639ea 100644
--- a/Tests/test_file_mpo.py
+++ b/Tests/test_file_mpo.py
@@ -288,6 +288,10 @@ def test_save_all_progress():
     progress = []
 
     def callback(state):
+        if state["image_filename"]:
+            state["image_filename"] = (
+                state["image_filename"].replace("\\", "/").split("Tests/images/")[-1]
+            )
         progress.append(state)
 
     Image.new("RGB", (1, 1)).save(out, "MPO", save_all=True, progress=callback)
@@ -308,9 +312,7 @@ def test_save_all_progress():
             im.save(out, "MPO", save_all=True, append_images=[im2], progress=callback)
 
     expected = []
-    for i, filename in enumerate(
-        ["Tests/images/sugarshack.mpo", "Tests/images/frozenpond.mpo"]
-    ):
+    for i, filename in enumerate(["sugarshack.mpo", "frozenpond.mpo"]):
         for j in range(2):
             expected.append(
                 {
diff --git a/Tests/test_file_pdf.py b/Tests/test_file_pdf.py
index 0b28760be..49049dab9 100644
--- a/Tests/test_file_pdf.py
+++ b/Tests/test_file_pdf.py
@@ -177,6 +177,10 @@ def test_save_all_progress() -> None:
     progress = []
 
     def callback(state):
+        if state["image_filename"]:
+            state["image_filename"] = (
+                state["image_filename"].replace("\\", "/").split("Tests/images/")[-1]
+            )
         progress.append(state)
 
     Image.new("RGB", (1, 1)).save(out, "PDF", save_all=True, progress=callback)
@@ -197,9 +201,7 @@ def test_save_all_progress() -> None:
             im.save(out, "PDF", save_all=True, append_images=[im2], progress=callback)
 
     expected = []
-    for i, filename in enumerate(
-        ["Tests/images/sugarshack.mpo", "Tests/images/frozenpond.mpo"]
-    ):
+    for i, filename in enumerate(["sugarshack.mpo", "frozenpond.mpo"]):
         for j in range(2):
             expected.append(
                 {
diff --git a/Tests/test_file_tiff.py b/Tests/test_file_tiff.py
index a30c362e4..38c89c867 100644
--- a/Tests/test_file_tiff.py
+++ b/Tests/test_file_tiff.py
@@ -704,6 +704,12 @@ class TestFileTiff:
         progress = []
 
         def callback(state):
+            if state["image_filename"]:
+                state["image_filename"] = (
+                    state["image_filename"]
+                    .replace("\\", "/")
+                    .split("Tests/images/")[-1]
+                )
             progress.append(state)
 
         Image.new("RGB", (1, 1)).save(out, "TIFF", save_all=True, progress=callback)
@@ -728,7 +734,7 @@ class TestFileTiff:
         expected = [
             {
                 "image_index": 0,
-                "image_filename": "Tests/images/hopper.tif",
+                "image_filename": "hopper.tif",
                 "completed_frames": 1,
                 "total_frames": 4,
             }
@@ -737,7 +743,7 @@ class TestFileTiff:
             expected.append(
                 {
                     "image_index": 1,
-                    "image_filename": "Tests/images/multipage.tiff",
+                    "image_filename": "multipage.tiff",
                     "completed_frames": i + 2,
                     "total_frames": 4,
                 }
diff --git a/Tests/test_file_webp.py b/Tests/test_file_webp.py
index 283179451..1595be59a 100644
--- a/Tests/test_file_webp.py
+++ b/Tests/test_file_webp.py
@@ -131,6 +131,12 @@ class TestFileWebp:
         progress = []
 
         def callback(state):
+            if state["image_filename"]:
+                state["image_filename"] = (
+                    state["image_filename"]
+                    .replace("\\", "/")
+                    .split("Tests/images/")[-1]
+                )
             progress.append(state)
 
         Image.new("RGB", (1, 1)).save(out, "WEBP", save_all=True, progress=callback)
@@ -155,7 +161,7 @@ class TestFileWebp:
             expected.append(
                 {
                     "image_index": 0,
-                    "image_filename": "Tests/images/iss634.webp",
+                    "image_filename": "iss634.webp",
                     "completed_frames": i + 1,
                     "total_frames": 43,
                 }