diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 369b5067..c68f7239 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -5,7 +5,7 @@ on:
   pull_request:
 
 jobs:
-  build:
+  test:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
@@ -50,5 +50,24 @@ jobs:
           cp .travis/docker.json pymysql/tests/databases.json
       - name: Run test
         run: |
-          pip install -U cryptography PyNaCl pytest pytest-cov mock
+          pip install -U cryptography PyNaCl pytest pytest-cov mock coveralls
           pytest -v --cov --cov-config .coveragerc pymysql
+      - name: Report coverage
+        run: coveralls
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COVERALLS_FLAG_NAME: ${{ matrix.test-name }}
+          COVERALLS_PARALLEL: true
+
+  coveralls:
+    name: Finish coveralls
+    runs-on: ubuntu-20.04
+    needs: test
+    container: python:3-slim
+    steps:
+    - name: Finished
+      run: |
+        pip3 install --upgrade coveralls
+        coveralls --finish
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/pymysql/connections.py b/pymysql/connections.py
index e426d151..6fd15e13 100644
--- a/pymysql/connections.py
+++ b/pymysql/connections.py
@@ -341,7 +341,7 @@ def _create_ssl_ctx(self, sslp):
         elif isinstance(verify_mode_value, bool):
             ctx.verify_mode = ssl.CERT_REQUIRED if verify_mode_value else ssl.CERT_NONE
         else:
-            if isinstance(verify_mode_value, (text_type, str_type)):
+            if isinstance(verify_mode_value, str):
                 verify_mode_value = verify_mode_value.lower()
             if verify_mode_value in ("none", "0", "false", "no"):
                 ctx.verify_mode = ssl.CERT_NONE
diff --git a/pymysql/converters.py b/pymysql/converters.py
index 0e40eab7..6d1fc9ee 100644
--- a/pymysql/converters.py
+++ b/pymysql/converters.py
@@ -74,11 +74,11 @@ def escape_string(value, mapping=None):
 
 
 def escape_bytes_prefixed(value, mapping=None):
-    return "_binary'%s'" % value.decode('ascii', 'surrogateescape')
+    return "_binary'%s'" % value.decode('ascii', 'surrogateescape').translate(_escape_table)
 
 
 def escape_bytes(value, mapping=None):
-    return "'%s'" % value.decode('ascii', 'surrogateescape')
+    return "'%s'" % value.decode('ascii', 'surrogateescape').translate(_escape_table)
 
 
 def escape_str(value, mapping=None):
diff --git a/pymysql/cursors.py b/pymysql/cursors.py
index 6f72ba35..a8c52836 100644
--- a/pymysql/cursors.py
+++ b/pymysql/cursors.py
@@ -1,5 +1,4 @@
 import re
-
 from . import err
 
 
diff --git a/pymysql/tests/test_cursor.py b/pymysql/tests/test_cursor.py
index fb3e8bed..4c9174f5 100644
--- a/pymysql/tests/test_cursor.py
+++ b/pymysql/tests/test_cursor.py
@@ -30,7 +30,6 @@ def test_cleanup_rows_unbuffered(self):
                 break
 
         del cursor
-        self.safe_gc_collect()
 
         c2 = conn.cursor()
 
@@ -48,10 +47,8 @@ def test_cleanup_rows_buffered(self):
                 break
 
         del cursor
-        self.safe_gc_collect()
 
         c2 = conn.cursor()
-
         c2.execute("select 1")
 
         self.assertEqual(
diff --git a/pymysql/tests/thirdparty/test_MySQLdb/capabilities.py b/pymysql/tests/thirdparty/test_MySQLdb/capabilities.py
index 6be9d1ba..e261a78e 100644
--- a/pymysql/tests/thirdparty/test_MySQLdb/capabilities.py
+++ b/pymysql/tests/thirdparty/test_MySQLdb/capabilities.py
@@ -8,7 +8,6 @@
 from time import time
 import unittest
 
-PY2 = sys.version_info[0] == 2
 
 class DatabaseTest(unittest.TestCase):
 
@@ -24,10 +23,7 @@ def setUp(self):
         self.connection = db
         self.cursor = db.cursor()
         self.BLOBText = ''.join([chr(i) for i in range(256)] * 100);
-        if PY2:
-            self.BLOBUText = unicode().join(unichr(i) for i in range(16834))
-        else:
-            self.BLOBUText = "".join(chr(i) for i in range(16834))
+        self.BLOBUText = "".join(chr(i) for i in range(16834))
         data = bytearray(range(256)) * 16
         self.BLOBBinary = self.db_module.Binary(data)
 
@@ -64,14 +60,12 @@ def new_table_name(self):
             i = i + 1
 
     def create_table(self, columndefs):
+        """
+        Create a table using a list of column definitions given in columndefs.
 
-        """ Create a table using a list of column definitions given in
-            columndefs.
-
-            generator must be a function taking arguments (row_number,
-            col_number) returning a suitable data object for insertion
-            into the table.
-
+        generator must be a function taking arguments (row_number,
+        col_number) returning a suitable data object for insertion
+        into the table.
         """
         self.table = self.new_table_name()
         self.cursor.execute('CREATE TABLE %s (%s) %s' %