diff --git a/.travis.yml b/.travis.yml
index 1d6ed662..5bc9c18f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,438 +10,66 @@ env:
     - TOXENV=docs
 matrix:
   include:
-    - python: '2.6'
-      env:
-        - TOXENV=py26-28-40
-    - python: '2.6'
-      env:
-        - TOXENV=py26-28-41
-    - python: '2.6'
-      env:
-        - TOXENV=py26-28-42
-    - python: '2.6'
-      env:
-        - TOXENV=py26-28-43
-    - python: '2.6'
-      env:
-        - TOXENV=py26-29-40
-    - python: '2.6'
-      env:
-        - TOXENV=py26-29-41
-    - python: '2.6'
-      env:
-        - TOXENV=py26-29-42
-    - python: '2.6'
-      env:
-        - TOXENV=py26-29-43
-    - python: '2.6'
-      env:
-        - TOXENV=py26-30-40
-    - python: '2.6'
-      env:
-        - TOXENV=py26-30-41
-    - python: '2.6'
-      env:
-        - TOXENV=py26-30-42
-    - python: '2.6'
-      env:
-        - TOXENV=py26-30-43
-    - python: '2.6'
-      env:
-        - TOXENV=py26-31-40
-    - python: '2.6'
-      env:
-        - TOXENV=py26-31-41
-    - python: '2.6'
-      env:
-        - TOXENV=py26-31-42
-    - python: '2.6'
-      env:
-        - TOXENV=py26-31-43
-    - python: '2.7'
-      env:
-        - TOXENV=py27-28-40
-    - python: '2.7'
-      env:
-        - TOXENV=py27-28-41
-    - python: '2.7'
-      env:
-        - TOXENV=py27-28-42
-    - python: '2.7'
-      env:
-        - TOXENV=py27-28-43
-    - python: '2.7'
-      env:
-        - TOXENV=py27-29-40
-    - python: '2.7'
-      env:
-        - TOXENV=py27-29-41
-    - python: '2.7'
-      env:
-        - TOXENV=py27-29-42
-    - python: '2.7'
-      env:
-        - TOXENV=py27-29-43
-    - python: '2.7'
-      env:
-        - TOXENV=py27-30-40
-    - python: '2.7'
-      env:
-        - TOXENV=py27-30-41
-    - python: '2.7'
-      env:
-        - TOXENV=py27-30-42
-    - python: '2.7'
-      env:
-        - TOXENV=py27-30-43
-    - python: '2.7'
-      env:
-        - TOXENV=py27-31-40
-    - python: '2.7'
-      env:
-        - TOXENV=py27-31-41
-    - python: '2.7'
-      env:
-        - TOXENV=py27-31-42
-    - python: '2.7'
-      env:
-        - TOXENV=py27-31-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-28-40
-    - python: '3.3'
-      env:
-        - TOXENV=py33-28-41
-    - python: '3.3'
-      env:
-        - TOXENV=py33-28-42
-    - python: '3.3'
-      env:
-        - TOXENV=py33-28-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-29-40
-    - python: '3.3'
-      env:
-        - TOXENV=py33-29-41
-    - python: '3.3'
-      env:
-        - TOXENV=py33-29-42
-    - python: '3.3'
-      env:
-        - TOXENV=py33-29-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-30-40
-    - python: '3.3'
-      env:
-        - TOXENV=py33-30-41
-    - python: '3.3'
-      env:
-        - TOXENV=py33-30-42
-    - python: '3.3'
-      env:
-        - TOXENV=py33-30-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-31-40
-    - python: '3.3'
-      env:
-        - TOXENV=py33-31-41
-    - python: '3.3'
-      env:
-        - TOXENV=py33-31-42
-    - python: '3.3'
-      env:
-        - TOXENV=py33-31-43
-    - python: '3.4'
-      env:
-        - TOXENV=py34-28-40
-    - python: '3.4'
-      env:
-        - TOXENV=py34-28-41
-    - python: '3.4'
-      env:
-        - TOXENV=py34-28-42
-    - python: '3.4'
-      env:
-        - TOXENV=py34-28-43
-    - python: '3.4'
-      env:
-        - TOXENV=py34-29-40
-    - python: '3.4'
-      env:
-        - TOXENV=py34-29-41
-    - python: '3.4'
-      env:
-        - TOXENV=py34-29-42
-    - python: '3.4'
-      env:
-        - TOXENV=py34-29-43
-    - python: '3.4'
-      env:
-        - TOXENV=py34-30-40
-    - python: '3.4'
-      env:
-        - TOXENV=py34-30-41
-    - python: '3.4'
-      env:
-        - TOXENV=py34-30-42
-    - python: '3.4'
-      env:
-        - TOXENV=py34-30-43
-    - python: '3.4'
-      env:
-        - TOXENV=py34-31-40
-    - python: '3.4'
-      env:
-        - TOXENV=py34-31-41
-    - python: '3.4'
-      env:
-        - TOXENV=py34-31-42
-    - python: '3.4'
-      env:
-        - TOXENV=py34-31-43
-    - python: '3.5'
-      env:
-        - TOXENV=py35-28-40
-    - python: '3.5'
-      env:
-        - TOXENV=py35-28-41
-    - python: '3.5'
-      env:
-        - TOXENV=py35-28-42
-    - python: '3.5'
-      env:
-        - TOXENV=py35-28-43
-    - python: '3.5'
-      env:
-        - TOXENV=py35-29-40
-    - python: '3.5'
-      env:
-        - TOXENV=py35-29-41
-    - python: '3.5'
-      env:
-        - TOXENV=py35-29-42
-    - python: '3.5'
-      env:
-        - TOXENV=py35-29-43
-    - python: '3.5'
-      env:
-        - TOXENV=py35-30-40
-    - python: '3.5'
-      env:
-        - TOXENV=py35-30-41
-    - python: '3.5'
-      env:
-        - TOXENV=py35-30-42
-    - python: '3.5'
-      env:
-        - TOXENV=py35-30-43
-    - python: '3.5'
-      env:
-        - TOXENV=py35-31-40
-    - python: '3.5'
-      env:
-        - TOXENV=py35-31-41
-    - python: '3.5'
-      env:
-        - TOXENV=py35-31-42
-    - python: '3.5'
-      env:
-        - TOXENV=py35-31-43
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-28-40
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-28-41
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-28-42
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-28-43
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-29-40
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-29-41
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-29-42
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-29-43
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-30-40
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-30-41
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-30-42
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-30-43
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-31-40
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-31-41
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-31-42
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-31-43
-    - python: '2.7'
-      env:
-        - TOXENV=py27-28-43
-    - python: '2.7'
-      env:
-        - TOXENV=py27-28-44
-    - python: '2.7'
-      env:
-        - TOXENV=py27-29-43
     - python: '2.7'
       env:
         - TOXENV=py27-29-44
-    - python: '2.7'
-      env:
-        - TOXENV=py27-30-43
     - python: '2.7'
       env:
         - TOXENV=py27-30-44
-    - python: '2.7'
-      env:
-        - TOXENV=py27-31-43
     - python: '2.7'
       env:
         - TOXENV=py27-31-44
-    - python: '3.3'
-      env:
-        - TOXENV=py33-28-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-28-44
-    - python: '3.3'
-      env:
-        - TOXENV=py33-29-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-29-44
-    - python: '3.3'
-      env:
-        - TOXENV=py33-30-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-30-44
-    - python: '3.3'
-      env:
-        - TOXENV=py33-31-43
-    - python: '3.3'
-      env:
-        - TOXENV=py33-31-44
-    - python: '3.4'
-      env:
-        - TOXENV=py34-28-43
-    - python: '3.4'
-      env:
-        - TOXENV=py34-28-44
-    - python: '3.4'
+    - python: '2.7'
       env:
-        - TOXENV=py34-29-43
+        - TOXENV=py27-32-44
     - python: '3.4'
       env:
         - TOXENV=py34-29-44
-    - python: '3.4'
-      env:
-        - TOXENV=py34-30-43
     - python: '3.4'
       env:
         - TOXENV=py34-30-44
-    - python: '3.4'
-      env:
-        - TOXENV=py34-31-43
     - python: '3.4'
       env:
         - TOXENV=py34-31-44
-    - python: '3.5'
-      env:
-        - TOXENV=py35-28-43
-    - python: '3.5'
-      env:
-        - TOXENV=py35-28-44
-    - python: '3.5'
+    - python: '3.4'
       env:
-        - TOXENV=py35-29-43
+        - TOXENV=py34-32-44
     - python: '3.5'
       env:
         - TOXENV=py35-29-44
-    - python: '3.5'
-      env:
-        - TOXENV=py35-30-43
     - python: '3.5'
       env:
         - TOXENV=py35-30-44
-    - python: '3.5'
-      env:
-        - TOXENV=py35-31-43
     - python: '3.5'
       env:
         - TOXENV=py35-31-44
-    - python: '3.6'
-      env:
-        - TOXENV=py36-28-43
-    - python: '3.6'
-      env:
-        - TOXENV=py36-28-44
-    - python: '3.6'
+    - python: '3.5'
       env:
-        - TOXENV=py36-29-43
+        - TOXENV=py35-32-44
     - python: '3.6'
       env:
         - TOXENV=py36-29-44
-    - python: '3.6'
-      env:
-        - TOXENV=py36-30-43
     - python: '3.6'
       env:
         - TOXENV=py36-30-44
-    - python: '3.6'
-      env:
-        - TOXENV=py36-31-43
     - python: '3.6'
       env:
         - TOXENV=py36-31-44
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-28-43
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-28-44
-    - python: 'pypy-5.4'
+    - python: '3.6'
       env:
-        - TOXENV=pypy-29-43
+        - TOXENV=py36-32-44
     - python: 'pypy-5.4'
       env:
         - TOXENV=pypy-29-44
-    - python: 'pypy-5.4'
-      env:
-        - TOXENV=pypy-30-43
     - python: 'pypy-5.4'
       env:
         - TOXENV=pypy-30-44
     - python: 'pypy-5.4'
       env:
-        - TOXENV=pypy-31-43
+        - TOXENV=pypy-31-44
     - python: 'pypy-5.4'
       env:
-        - TOXENV=pypy-31-44
+        - TOXENV=pypy-32-44
 before_install:
   - python --version
   - uname -a
diff --git a/appveyor.yml b/appveyor.yml
index 89aa4da8..48060ab3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,11 +5,10 @@ cache:
 environment:
   matrix:
     - TOXENV: check
-    - TOXENV: 'py26-28-40,py26-28-41,py26-28-42,py26-28-43,py26-29-40,py26-29-41,py26-29-42,py26-29-43,py26-30-40,py26-30-41,py26-30-42,py26-30-43,py26-31-40,py26-31-41,py26-31-42,py26-31-43'
-    - TOXENV: 'py27-28-40,py27-28-41,py27-28-42,py27-28-43,py27-29-40,py27-29-41,py27-29-42,py27-29-43,py27-30-40,py27-30-41,py27-30-42,py27-30-43,py27-31-40,py27-31-41,py27-31-42,py27-31-43,py27-28-43,py27-28-44,py27-29-43,py27-29-44,py27-30-43,py27-30-44,py27-31-43,py27-31-44'
-    - TOXENV: 'py34-28-40,py34-28-41,py34-28-42,py34-28-43,py34-29-40,py34-29-41,py34-29-42,py34-29-43,py34-30-40,py34-30-41,py34-30-42,py34-30-43,py34-31-40,py34-31-41,py34-31-42,py34-31-43,py34-28-43,py34-28-44,py34-29-43,py34-29-44,py34-30-43,py34-30-44,py34-31-43,py34-31-44'
-    - TOXENV: 'py35-28-40,py35-28-41,py35-28-42,py35-28-43,py35-29-40,py35-29-41,py35-29-42,py35-29-43,py35-30-40,py35-30-41,py35-30-42,py35-30-43,py35-31-40,py35-31-41,py35-31-42,py35-31-43,py35-28-43,py35-28-44,py35-29-43,py35-29-44,py35-30-43,py35-30-44,py35-31-43,py35-31-44'
-    - TOXENV: 'pypy-28-40,pypy-28-41,pypy-28-42,pypy-28-43,pypy-29-40,pypy-29-41,pypy-29-42,pypy-29-43,pypy-30-40,pypy-30-41,pypy-30-42,pypy-30-43,pypy-31-40,pypy-31-41,pypy-31-42,pypy-31-43,pypy-28-43,pypy-28-44,pypy-29-43,pypy-29-44,pypy-30-43,pypy-30-44,pypy-31-43,pypy-31-44'
+    - TOXENV: 'py27-29-44,py27-30-44,py27-31-44,py27-32-44'
+    - TOXENV: 'py34-29-44,py34-30-44,py34-31-44,py34-32-44'
+    - TOXENV: 'py35-29-44,py35-30-44,py35-31-44,py35-32-44'
+    - TOXENV: 'pypy-29-44,pypy-30-44,pypy-31-44,pypy-32-44'
 
 init:
   - ps: echo $env:TOXENV
diff --git a/ci/bootstrap.py b/ci/bootstrap.py
index 98fe8c79..7798166b 100755
--- a/ci/bootstrap.py
+++ b/ci/bootstrap.py
@@ -12,7 +12,7 @@
 
 if __name__ == "__main__":
     base_path = dirname(dirname(abspath(__file__)))
-    print("Project path: {0}".format(base_path))
+    print("Project path: {}".format(base_path))
     env_path = join(base_path, ".tox", "bootstrap")
     if sys.platform == "win32":
         bin_path = join(env_path, "Scripts")
@@ -20,7 +20,7 @@
         bin_path = join(env_path, "bin")
     if not exists(env_path):
         import subprocess
-        print("Making bootstrap env in: {0} ...".format(env_path))
+        print("Making bootstrap env in: {} ...".format(env_path))
         try:
             subprocess.check_call(["virtualenv", env_path])
         except Exception:
@@ -46,7 +46,7 @@
     tox_environments = [line for line in tox_environments if line not in ['clean', 'report', 'docs', 'check']]
 
     template_vars = {'tox_environments': tox_environments}
-    for py_ver in '26 27 33 34 35 py'.split():
+    for py_ver in '27 34 35 py'.split():
         template_vars['py%s_environments' % py_ver] = [x for x in tox_environments if x.startswith('py' + py_ver)]
 
     for name in os.listdir(join("ci", "templates")):
diff --git a/ci/templates/appveyor.yml b/ci/templates/appveyor.yml
index 2455e981..eddf1905 100644
--- a/ci/templates/appveyor.yml
+++ b/ci/templates/appveyor.yml
@@ -5,7 +5,6 @@ cache:
 environment:
   matrix:
     - TOXENV: check
-    - TOXENV: '{{ py26_environments|join(",") }}'
     - TOXENV: '{{ py27_environments|join(",") }}'
     - TOXENV: '{{ py34_environments|join(",") }}'
     - TOXENV: '{{ py35_environments|join(",") }}'
diff --git a/docs/conf.py b/docs/conf.py
index 220a371d..adb940c6 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -24,7 +24,7 @@
 project = 'pytest-cov'
 year = '2016'
 author = 'pytest-cov contributors'
-copyright = '{0}, {1}'.format(year, author)
+copyright = '{}, {}'.format(year, author)
 version = release = '2.5.1'
 
 pygments_style = 'trac'
diff --git a/setup.py b/setup.py
index 1cd7c64d..31c7dad0 100644
--- a/setup.py
+++ b/setup.py
@@ -105,10 +105,9 @@ def run(self):
         'Operating System :: POSIX',
         'Operating System :: Unix',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.6',
+        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
@@ -121,9 +120,10 @@ def run(self):
         'cover', 'coverage', 'pytest', 'py.test', 'distributed', 'parallel',
     ],
     install_requires=[
-        'pytest>=2.6.0',
-        'coverage>=3.7.1'
+        'pytest>=2.9',
+        'coverage>=4.4'
     ],
+    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
     extras_require={
     },
     entry_points={
diff --git a/src/pytest_cov/engine.py b/src/pytest_cov/engine.py
index 6fd22908..824c0618 100644
--- a/src/pytest_cov/engine.py
+++ b/src/pytest_cov/engine.py
@@ -25,6 +25,8 @@ def __init__(self, cov_source, cov_report, cov_config, cov_append, cov_branch, c
         self.nodeid = nodeid
 
         self.cov = None
+        self.combining_cov = None
+        self.data_file = None
         self.node_descs = set()
         self.failed_slaves = []
         self.topdir = os.getcwd()
@@ -136,10 +138,13 @@ class Central(CovController):
 
     def start(self):
         """Erase any previous coverage data and start coverage."""
-
         self.cov = coverage.coverage(source=self.cov_source,
                                      branch=self.cov_branch,
                                      config_file=self.cov_config)
+        self.combining_cov = coverage.coverage(source=self.cov_source,
+                                               branch=self.cov_branch,
+                                               data_file=os.path.abspath(self.cov.config.data_file),
+                                               config_file=self.cov_config)
         if self.cov_append:
             self.cov.load()
         else:
@@ -152,8 +157,13 @@ def finish(self):
 
         self.unset_env()
         self.cov.stop()
+        self.cov.save()
+
+        self.cov = self.combining_cov
+        self.cov.load()
         self.cov.combine()
         self.cov.save()
+
         node_desc = self.get_node_desc(sys.platform, sys.version_info)
         self.node_descs.add(node_desc)
 
@@ -170,6 +180,10 @@ def start(self):
         self.cov = coverage.coverage(source=self.cov_source,
                                      branch=self.cov_branch,
                                      config_file=self.cov_config)
+        self.combining_cov = coverage.coverage(source=self.cov_source,
+                                               branch=self.cov_branch,
+                                               data_file=os.path.abspath(self.cov.config.data_file),
+                                               config_file=self.cov_config)
         if self.cov_append:
             self.cov.load()
         else:
@@ -207,12 +221,9 @@ def testnodedown(self, node, error):
                                     data_suffix=data_suffix,
                                     config_file=self.cov_config)
             cov.start()
-            if hasattr(self.cov.data, 'read_fileobj'):  # for coverage 4.0
-                data = CoverageData()
-                data.read_fileobj(StringIO(node.slaveoutput['cov_slave_data']))
-                cov.data.update(data)
-            else:
-                cov.data.lines, cov.data.arcs = node.slaveoutput['cov_slave_data']
+            data = CoverageData()
+            data.read_fileobj(StringIO(node.slaveoutput['cov_slave_data']))
+            cov.data.update(data)
             cov.stop()
             cov.save()
             path = node.slaveoutput['cov_slave_path']
@@ -228,6 +239,9 @@ def finish(self):
 
         # Combine all the suffix files into the data file.
         self.cov.stop()
+        self.cov.save()
+        self.cov = self.combining_cov
+        self.cov.load()
         self.cov.combine()
         self.cov.save()
 
@@ -286,12 +300,9 @@ def finish(self):
             # Send all the data to the master over the channel.
             self.config.slaveoutput['cov_slave_path'] = self.topdir
             self.config.slaveoutput['cov_slave_node_id'] = self.nodeid
-            if hasattr(self.cov.data, 'write_fileobj'):  # for coverage 4.0
-                buff = StringIO()
-                self.cov.data.write_fileobj(buff)
-                self.config.slaveoutput['cov_slave_data'] = buff.getvalue()
-            else:
-                self.config.slaveoutput['cov_slave_data'] = self.cov.data.lines, self.cov.data.arcs
+            buff = StringIO()
+            self.cov.data.write_fileobj(buff)
+            self.config.slaveoutput['cov_slave_data'] = buff.getvalue()
 
     def summary(self, stream):
         """Only the master reports so do nothing."""
diff --git a/src/pytest_cov/plugin.py b/src/pytest_cov/plugin.py
index 2ddf61ea..e03ec2a0 100644
--- a/src/pytest_cov/plugin.py
+++ b/src/pytest_cov/plugin.py
@@ -98,14 +98,6 @@ def pytest_load_initial_conftests(early_config, parser, args):
         early_config.pluginmanager.register(plugin, '_cov')
 
 
-def pytest_configure(config):
-    """Activate coverage plugin if appropriate."""
-    if config.getvalue('cov_source'):
-        if not config.pluginmanager.hasplugin('_cov'):
-            plugin = CovPlugin(config.option, config.pluginmanager, start=False)
-            config.pluginmanager.register(plugin, '_cov')
-
-
 class CovPlugin(object):
     """Use coverage package to produce code coverage reports.
 
diff --git a/tests/test_pytest_cov.py b/tests/test_pytest_cov.py
index e056bb0d..e4057ead 100644
--- a/tests/test_pytest_cov.py
+++ b/tests/test_pytest_cov.py
@@ -65,6 +65,7 @@ def test_bar():
 '''
 
 SCRIPT_PARENT = '''
+import os
 import subprocess
 import sys
 
@@ -74,7 +75,7 @@ def pytest_generate_tests(metafunc):
 
 def test_foo(idx):
     out, err = subprocess.Popen(
-        [sys.executable, 'child_script.py', str(idx)],
+        [sys.executable, os.path.join(os.path.dirname(__file__), 'child_script.py'), str(idx)],
         stdout=subprocess.PIPE,
         stderr=subprocess.PIPE).communicate()
 
@@ -149,7 +150,7 @@ def test_fail():
 '''
 
 CHILD_SCRIPT_RESULT = '[56] * 100%'
-PARENT_SCRIPT_RESULT = '8 * 100%'
+PARENT_SCRIPT_RESULT = '9 * 100%'
 DEST_DIR = 'cov_dest'
 REPORT_NAME = 'cov.xml'
 
@@ -168,6 +169,7 @@ def prop(request):
         code2=SCRIPT2,
         conf=request.param[0],
         fullconf='[run]\n%s\n' % request.param[0],
+        prefixedfullconf='[coverage:run]\n%s\n' % request.param[0],
         args=request.param[1].split(),
         result=request.param[2],
         result2=request.param[3],
@@ -271,10 +273,7 @@ def test_term_output_dir(testdir):
                                '--cov-report=term:' + DEST_DIR,
                                script)
 
-    # backport of argparse to py26 doesn't display ArgumentTypeError message
     result.stderr.fnmatch_lines([
-        '*argument --cov-report: *',
-    ] if tuple(sys.version_info[:2]) == (2, 6) else [
         '*argument --cov-report: output specifier not supported for: "term:%s"*' % DEST_DIR,
     ])
     assert result.ret != 0
@@ -288,10 +287,7 @@ def test_term_missing_output_dir(testdir):
                                '--cov-report=term-missing:' + DEST_DIR,
                                script)
 
-    # backport of argparse to py26 doesn't display ArgumentTypeError message
     result.stderr.fnmatch_lines([
-        '*argument --cov-report: *',
-    ] if tuple(sys.version_info[:2]) == (2, 6) else [
         '*argument --cov-report: output specifier not supported for: '
         '"term-missing:%s"*' % DEST_DIR,
     ])
@@ -400,6 +396,79 @@ def test_central_coveragerc(testdir, prop):
     assert result.ret == 0
 
 
+@xdist
+def test_central_with_path_aliasing(testdir, monkeypatch, opts, prop):
+    mod1 = testdir.mkdir('src').join('mod.py')
+    mod1.write(SCRIPT)
+    mod2 = testdir.mkdir('aliased').join('mod.py')
+    mod2.write(SCRIPT)
+    script = testdir.makepyfile('''
+from mod import *
+''')
+    testdir.tmpdir.join('setup.cfg').write("""
+[coverage:paths]
+source =
+    src
+    aliased
+[coverage:run]
+source = mod
+parallel = true
+%s
+""" % prop.conf)
+
+    monkeypatch.setitem(os.environ, 'PYTHONPATH', os.pathsep.join([os.environ.get('PYTHONPATH', ''), 'aliased']))
+    result = testdir.runpytest('-v', '-s',
+                               '--cov',
+                               '--cov-report=term-missing',
+                               script, *opts.split()+prop.args)
+
+    result.stdout.fnmatch_lines([
+        '*- coverage: platform *, python * -*',
+        'src[\\/]mod* %s *' % prop.result,
+        '*10 passed*',
+    ])
+
+    # single-module coverage report
+    assert all(not line.startswith('TOTAL ') for line in result.stdout.lines[-4:])
+
+    assert result.ret == 0
+
+
+def test_subprocess_with_path_aliasing(testdir, monkeypatch):
+    src = testdir.mkdir('src')
+    src.join('parent_script.py').write(SCRIPT_PARENT)
+    src.join('child_script.py').write(SCRIPT_CHILD)
+    aliased = testdir.mkdir('aliased')
+    parent_script = aliased.join('parent_script.py')
+    parent_script.write(SCRIPT_PARENT)
+    aliased.join('child_script.py').write(SCRIPT_CHILD)
+
+    testdir.tmpdir.join('.coveragerc').write("""
+[paths]
+source =
+    src
+    aliased
+[run]
+source =
+    parent_script
+    child_script
+parallel = true
+""")
+
+    monkeypatch.setitem(os.environ, 'PYTHONPATH', os.pathsep.join([os.environ.get('PYTHONPATH',''), 'aliased']))
+    result = testdir.runpytest('-v',
+                               '--cov',
+                               '--cov-report=term-missing',
+                               parent_script)
+
+    result.stdout.fnmatch_lines([
+        '*- coverage: platform *, python * -*',
+        'src[\\/]child_script* %s*' % CHILD_SCRIPT_RESULT,
+        'src[\\/]parent_script* %s*' % PARENT_SCRIPT_RESULT,
+    ])
+    assert result.ret == 0
+
+
 def test_show_missing_coveragerc(testdir, prop):
     script = testdir.makepyfile(prop.code)
     testdir.tmpdir.join('.coveragerc').write("""
@@ -524,7 +593,14 @@ def test_dist_not_collocated(testdir, prop):
     script = testdir.makepyfile(prop.code)
     dir1 = testdir.mkdir('dir1')
     dir2 = testdir.mkdir('dir2')
-    testdir.tmpdir.join('.coveragerc').write(prop.fullconf)
+    testdir.tmpdir.join('.coveragerc').write('''
+[run]
+%s
+[paths]
+source =
+    .
+    dir1
+    dir2''' % prop.conf)
 
     result = testdir.runpytest('-v',
                                '--cov=%s' % script.dirpath(),
@@ -581,8 +657,8 @@ def test_central_subprocess_change_cwd(testdir):
 
     result.stdout.fnmatch_lines([
         '*- coverage: platform *, python * -*',
-        'child_script* %s*' % CHILD_SCRIPT_RESULT,
-        'parent_script* 100%*',
+        '*child_script* %s*' % CHILD_SCRIPT_RESULT,
+        '*parent_script* 100%*',
     ])
     assert result.ret == 0
 
@@ -666,15 +742,21 @@ def test_dist_subprocess_not_collocated(testdir, tmpdir):
 
     dir1 = tmpdir.mkdir('dir1')
     dir2 = tmpdir.mkdir('dir2')
-
+    testdir.tmpdir.join('.coveragerc').write('''
+[paths]
+source =
+    %s
+    */dir1
+    */dir2
+''' % scripts.dirpath())
     result = testdir.runpytest('-v',
                                '--cov=%s' % scripts.dirpath(),
-                               '--cov-report=term-missing',
                                '--dist=load',
                                '--tx=popen//chdir=%s' % dir1,
                                '--tx=popen//chdir=%s' % dir2,
                                '--rsyncdir=%s' % child_script,
                                '--rsyncdir=%s' % parent_script,
+                               '--rsyncdir=.coveragerc',
                                '--max-slave-restart=0',
                                parent_script)
 
@@ -719,7 +801,7 @@ def test_dist_missing_data(testdir):
         exe = os.path.join(venv_path, 'bin', 'python')
     subprocess.check_call([
         exe,
-        '-mpip' if sys.version_info >= (2, 7) else '-mpip.__main__',
+        '-mpip',
         'install',
         'py==%s' % py.__version__,
         'pytest==%s' % pytest.__version__
diff --git a/tox.ini b/tox.ini
index 89fc9a1d..9f17ec07 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,16 +3,13 @@
 [tox]
 envlist =
     check,
-    {py26,py27,py33,py34,py35,pypy}-{28,29,30,31}-{40,41,42,43},
-    {py27,py33,py34,py35,py36,pypy}-{28,29,30,31}-{43,44},
+    {py27,py34,py35,py36,pypy}-{29,30,31,32}-44,
     docs
 
 [testenv]
 basepython =
     pypy: pypy
-    py26: {env:TOXPYTHON:python2.6}
     {py27,docs}: {env:TOXPYTHON:python2.7}
-    py33: {env:TOXPYTHON:python3.3}
     py34: {env:TOXPYTHON:python3.4}
     py35: {env:TOXPYTHON:python3.5}
     py36: {env:TOXPYTHON:python3.6}
@@ -23,27 +20,17 @@ setenv =
 passenv =
     *
 deps =
-    28: pytest==2.8.7
-    28: pytest-xdist==1.17.1
-
     29: pytest==2.9.2
-    29: pytest-xdist==1.17.1
-
     30: pytest==3.0.7
-    30: pytest-xdist==1.18.2
-
     31: pytest==3.1.3
-    31: pytest-xdist==1.18.2
+    32: pytest==3.2.5
+    pytest-xdist==1.20.1
 
-    37: coverage==3.7.1
-    40: coverage==4.0.3
-    41: coverage==4.1
-    42: coverage==4.2
-    43: coverage==4.3.4
-    44: coverage==4.4.1
+    44: coverage==4.4.2
 
     virtualenv
-    process-tests==1.2.1
+    hunter
+    process-tests==1.2.2
     six
     fields
 pip_pre = true