diff --git a/Tests/test_file_gif.py b/Tests/test_file_gif.py
index 8be614412a3..68301a84f3c 100644
--- a/Tests/test_file_gif.py
+++ b/Tests/test_file_gif.py
@@ -71,9 +71,7 @@ def test_optimize_correctness(self):
         def check(colors, size, expected_palette_length):
             # make an image with empty colors in the start of the palette range
             im = Image.frombytes(
-                "P",
-                (colors, colors),
-                bytes(bytearray(range(256 - colors, 256)) * colors),
+                "P", (colors, colors), bytes(range(256 - colors, 256)) * colors
             )
             im = im.resize((size, size))
             outfile = BytesIO()
@@ -103,7 +101,7 @@ def check(colors, size, expected_palette_length):
         check(256, 511, 256)
 
     def test_optimize_full_l(self):
-        im = Image.frombytes("L", (16, 16), bytes(bytearray(range(256))))
+        im = Image.frombytes("L", (16, 16), bytes(range(256)))
         test_file = BytesIO()
         im.save(test_file, "GIF", optimize=True)
         self.assertEqual(im.mode, "L")
@@ -632,7 +630,7 @@ def test_transparent_optimize(self):
         # that's > 128 items where the transparent color is actually
         # the top palette entry to trigger the bug.
 
-        data = bytes(bytearray(range(1, 254)))
+        data = bytes(range(1, 254))
         palette = ImagePalette.ImagePalette("RGB", list(range(256)) * 3)
 
         im = Image.new("L", (253, 1))
@@ -680,7 +678,7 @@ def test_palette_save_L(self):
 
         im = hopper("P")
         im_l = Image.frombytes("L", im.size, im.tobytes())
-        palette = bytes(bytearray(im.getpalette()))
+        palette = bytes(im.getpalette())
 
         out = self.tempfile("temp.gif")
         im_l.save(out, palette=palette)
@@ -695,7 +693,7 @@ def test_palette_save_P(self):
         # Forcing a non-straight grayscale palette.
 
         im = hopper("P")
-        palette = bytes(bytearray([255 - i // 3 for i in range(768)]))
+        palette = bytes([255 - i // 3 for i in range(768)])
 
         out = self.tempfile("temp.gif")
         im.save(out, palette=palette)
@@ -736,7 +734,7 @@ def test_getdata(self):
         im.putpalette(ImagePalette.ImagePalette("RGB"))
         im.info = {"background": 0}
 
-        passed_palette = bytes(bytearray([255 - i // 3 for i in range(768)]))
+        passed_palette = bytes([255 - i // 3 for i in range(768)])
 
         GifImagePlugin._FORCE_OPTIMIZE = True
         try:
diff --git a/Tests/test_lib_pack.py b/Tests/test_lib_pack.py
index 6178184bc1d..45958d2eb1a 100644
--- a/Tests/test_lib_pack.py
+++ b/Tests/test_lib_pack.py
@@ -18,7 +18,7 @@ def assert_pack(self, mode, rawmode, data, *pixels):
 
         if isinstance(data, int):
             data_len = data * len(pixels)
-            data = bytes(bytearray(range(1, data_len + 1)))
+            data = bytes(range(1, data_len + 1))
 
         self.assertEqual(data, im.tobytes("raw", rawmode))
 
@@ -226,7 +226,7 @@ def assert_unpack(self, mode, rawmode, data, *pixels):
         """
         if isinstance(data, int):
             data_len = data * len(pixels)
-            data = bytes(bytearray(range(1, data_len + 1)))
+            data = bytes(range(1, data_len + 1))
 
         im = Image.frombytes(mode, (len(pixels), 1), data, "raw", rawmode, 0, 1)
 
diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index 1094a6072e2..a6fa412ca96 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -1742,7 +1742,7 @@ def goToEnd(self):
         # pad to 16 byte boundary
         padBytes = 16 - pos % 16
         if 0 < padBytes < 16:
-            self.f.write(bytes(bytearray(padBytes)))
+            self.f.write(bytes(padBytes))
         self.offsetOfNewPage = self.f.tell()
 
     def setEndian(self, endian):