diff --git a/Tests/test_image_frombytes.py b/Tests/test_image_frombytes.py
index c191c0a6f..bfdb02685 100644
--- a/Tests/test_image_frombytes.py
+++ b/Tests/test_image_frombytes.py
@@ -17,3 +17,4 @@ def test_sanity(data_type: str) -> None:
     im2 = Image.frombytes(im1.mode, im1.size, data)
 
     assert_image_equal(im1, im2)
+    
\ No newline at end of file
diff --git a/Tests/test_new_imagemerge.py b/Tests/test_new_imagemerge.py
new file mode 100644
index 000000000..21b8a1bfd
--- /dev/null
+++ b/Tests/test_new_imagemerge.py
@@ -0,0 +1,30 @@
+import pytest
+
+from PIL import Image
+
+def calculate_branch_coverage():
+    b = Image.Branches
+    print("Branches covered:", sum(b.values()))
+
+
+def test_merge_wrong_number_of_bands():
+    R = Image.new('L', (100, 100), color=255)
+    G = Image.new('L', (100, 100), color=128)
+    with pytest.raises(ValueError, match="wrong number of bands"):
+        Image.merge('RGB', [R, G]) 
+
+def test_merge_mode_mismatch():
+    R = Image.new('L', (100, 100), color=255)
+    G = Image.new('L', (100, 100), color=128)
+    B = Image.new('1', (100, 100))  # Incorrect mode
+    with pytest.raises(ValueError, match="mode mismatch"):
+        Image.merge('RGB', [R, G, B])
+
+def test_merge_size_mismatch():
+    R = Image.new('L', (100, 100), color=255)
+    G = Image.new('L', (200, 100), color=128)  # Different size
+    B = Image.new('L', (100, 100), color=0)
+    with pytest.raises(ValueError, match="size mismatch"):
+        Image.merge('RGB', [R, G, B])
+
+
diff --git a/conftest.py b/conftest.py
index ff3fe1d2c..57a5a80db 100644
--- a/conftest.py
+++ b/conftest.py
@@ -25,7 +25,6 @@ def calculate_coverage(test_name):
         print(f"{name} - Total branches: {num_branches}")
         print(f"{name} - BRANCH COVERAGE: {coverage}%\n")
 
-
     return all_branches["branches1"]