diff --git a/.ci/install.sh b/.ci/install.sh
index 8e819631a..180fa6582 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -7,6 +7,7 @@ sudo apt-get -qq install libfreetype6-dev liblcms2-dev python3-tk\
                          ghostscript libffi-dev libjpeg-turbo-progs libopenjp2-7-dev\
                          cmake imagemagick libharfbuzz-dev libfribidi-dev
 
+pip install --upgrade pip
 PYTHONOPTIMIZE=0 pip install cffi
 pip install coverage
 pip install olefile
@@ -20,7 +21,7 @@ if [[ $TRAVIS_PYTHON_VERSION == 3.* ]]; then
   # "ERROR: Could not find a version that satisfies the requirement pyqt5"
   if [[ $TRAVIS_CPU_ARCH == "amd64" ]]; then
     sudo apt-get -qq install pyqt5-dev-tools
-    pip install pyqt5!=5.14.1
+    pip install pyqt5
   fi
 fi
 
diff --git a/Tests/test_file_png.py b/Tests/test_file_png.py
index 469d186e8..476995dd7 100644
--- a/Tests/test_file_png.py
+++ b/Tests/test_file_png.py
@@ -637,6 +637,9 @@ class TestFilePng:
         with Image.open(TEST_PNG_FILE) as im:
             im.seek(0)
 
+            with pytest.raises(EOFError):
+                im.seek(1)
+
 
 @pytest.mark.skipif(is_win32(), reason="Requires Unix or macOS")
 @skip_unless_feature("zlib")
diff --git a/Tests/test_imagedraw.py b/Tests/test_imagedraw.py
index cc29c097e..7a900283e 100644
--- a/Tests/test_imagedraw.py
+++ b/Tests/test_imagedraw.py
@@ -293,8 +293,11 @@ def test_ellipse_edge():
 
 
 def test_ellipse_symmetric():
-    for bbox in [(24, 25, 76, 75), (25, 25, 75, 75), (25, 24, 75, 76)]:
-        im = Image.new("RGB", (101, 101))
+    for width, bbox in (
+        (100, (24, 24, 75, 75)),
+        (101, (25, 25, 75, 75)),
+    ):
+        im = Image.new("RGB", (width, 100))
         draw = ImageDraw.Draw(im)
         draw.ellipse(bbox, fill="green", outline="blue")
         assert_image_equal(im, im.transpose(Image.FLIP_LEFT_RIGHT))
diff --git a/docs/reference/plugins.rst b/docs/reference/plugins.rst
index 46f657fce..cc0742fde 100644
--- a/docs/reference/plugins.rst
+++ b/docs/reference/plugins.rst
@@ -229,7 +229,7 @@ Plugin reference
 ----------------------------
 
 .. automodule:: PIL.PngImagePlugin
-    :members: ChunkStream, PngImageFile, PngStream, getchunks, is_cid, putchunk
+    :members: ChunkStream, PngStream, getchunks, is_cid, putchunk
     :show-inheritance:
 .. autoclass:: PIL.PngImagePlugin.ChunkStream
     :members:
diff --git a/src/PIL/PngImagePlugin.py b/src/PIL/PngImagePlugin.py
index 0291df4b0..ee9d52b4c 100644
--- a/src/PIL/PngImagePlugin.py
+++ b/src/PIL/PngImagePlugin.py
@@ -673,7 +673,7 @@ class PngImageFile(ImageFile.ImageFile):
         self._text = None
         self.tile = self.png.im_tile
         self.custom_mimetype = self.png.im_custom_mimetype
-        self._n_frames = self.png.im_n_frames
+        self.n_frames = self.png.im_n_frames or 1
         self.default_image = self.info.get("default_image", False)
 
         if self.png.im_palette:
@@ -685,15 +685,16 @@ class PngImageFile(ImageFile.ImageFile):
         else:
             self.__prepare_idat = length  # used by load_prepare()
 
-        if self._n_frames is not None:
+        if self.png.im_n_frames is not None:
             self._close_exclusive_fp_after_loading = False
             self.png.save_rewind()
             self.__rewind_idat = self.__prepare_idat
             self.__rewind = self.__fp.tell()
             if self.default_image:
                 # IDAT chunk contains default image and not first animation frame
-                self._n_frames += 1
+                self.n_frames += 1
             self._seek(0)
+        self.is_animated = self.n_frames > 1
 
     @property
     def text(self):
@@ -710,16 +711,6 @@ class PngImageFile(ImageFile.ImageFile):
                 self.seek(frame)
         return self._text
 
-    @property
-    def n_frames(self):
-        if self._n_frames is None:
-            return 1
-        return self._n_frames
-
-    @property
-    def is_animated(self):
-        return self._n_frames is not None and self._n_frames > 1
-
     def verify(self):
         """Verify PNG file"""
 
diff --git a/src/libImaging/Draw.c b/src/libImaging/Draw.c
index 20fcbe493..96884ff78 100644
--- a/src/libImaging/Draw.c
+++ b/src/libImaging/Draw.c
@@ -1039,7 +1039,7 @@ int8_t quarter_next(quarter_state* s, int32_t* ret_x, int32_t* ret_y) {
 
 // quarter_* stuff can "draw" a quarter of an ellipse with thickness 1, great.
 // Now we use ellipse_* stuff to join all four quarters of two different sized
-// ellipses and recieve horizontal segments of a complete ellipse with
+// ellipses and receive horizontal segments of a complete ellipse with
 // specified thickness.
 //
 // Still using integer grid with step 2 at this point (like in quarter_*)