diff --git a/cibuildwheel/__main__.py b/cibuildwheel/__main__.py
index 99fea065..d680e9b8 100644
--- a/cibuildwheel/__main__.py
+++ b/cibuildwheel/__main__.py
@@ -105,30 +105,12 @@ def main():
     # This needs to be passed on to the docker container in linux.py
     os.environ['CIBUILDWHEEL'] = '1'
 
-    try:
-        project_setup_py = os.path.join(project_dir, 'setup.py')
-        name_output = subprocess.check_output([sys.executable, project_setup_py, '--name'],
-                                              universal_newlines=True)
-        # the last line of output is the name
-        package_name = name_output.strip().splitlines()[-1]
-    except subprocess.CalledProcessError as err:
-        if not os.path.exists(project_setup_py):
-            print('cibuildwheel: Could not find setup.py at root of project', file=sys.stderr)
-            exit(2)
-        else:
-            print(err.output)
-            print('cibuildwheel: Failed to get name of the package. Command was %s' % err.cmd,
-                  file=sys.stderr)
-            exit(err.returncode)
-
-    if package_name == '' or package_name == 'UNKNOWN':
-        print('cibuildwheel: Invalid package name "%s". Check your setup.py' % package_name,
-              file=sys.stderr)
+    if not os.path.exists(os.path.join(project_dir, 'setup.py')):
+        print('cibuildwheel: Could not find setup.py at root of project', file=sys.stderr)
         exit(2)
 
     build_options = dict(
         project_dir=project_dir,
-        package_name=package_name,
         output_dir=output_dir,
         test_command=test_command,
         test_requires=test_requires,
diff --git a/cibuildwheel/linux.py b/cibuildwheel/linux.py
index 1613d120..027fed8f 100644
--- a/cibuildwheel/linux.py
+++ b/cibuildwheel/linux.py
@@ -9,7 +9,7 @@ except ImportError:
     from pipes import quote as shlex_quote
 
 
-def build(project_dir, package_name, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment, manylinux1_images):
+def build(project_dir, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment, manylinux1_images):
     try:
         subprocess.check_call(['docker', '--version'])
     except:
@@ -102,7 +102,6 @@ def build(project_dir, package_name, output_dir, test_command, test_requires, be
                 chown {uid}:{gid} "/output/$(basename "$delocated_wheel")"
             done
         '''.format(
-            package_name=package_name,
             pybin_paths=' '.join(c.path+'/bin' for c in platform_configs),
             test_requires=' '.join(test_requires),
             test_command=shlex_quote(
diff --git a/cibuildwheel/macos.py b/cibuildwheel/macos.py
index 906da91a..ccdd3780 100644
--- a/cibuildwheel/macos.py
+++ b/cibuildwheel/macos.py
@@ -10,7 +10,7 @@ except ImportError:
 from .util import prepare_command, get_build_verbosity_extra_flags
 
 
-def build(project_dir, package_name, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment):
+def build(project_dir, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment):
     PythonConfiguration = namedtuple('PythonConfiguration', ['version', 'identifier', 'url'])
     python_configurations = [
         PythonConfiguration(version='2.7', identifier='cp27-macosx_10_6_intel', url='https://www.python.org/ftp/python/2.7.15/python-2.7.15-macosx10.6.pkg'),
diff --git a/cibuildwheel/windows.py b/cibuildwheel/windows.py
index 51d428ce..f5a4ffb8 100644
--- a/cibuildwheel/windows.py
+++ b/cibuildwheel/windows.py
@@ -10,7 +10,7 @@ from glob import glob
 from .util import prepare_command, get_build_verbosity_extra_flags
 
 
-def build(project_dir, package_name, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment):
+def build(project_dir, output_dir, test_command, test_requires, before_build, build_verbosity, build_selector, environment):
     # run_with_env is a cmd file that sets the right environment variables to
     run_with_env = os.path.join(tempfile.gettempdir(), 'appveyor_run_with_env.cmd')
     if not os.path.exists(run_with_env):
diff --git a/test/03_before_build/setup.py b/test/03_before_build/setup.py
index 333de6e8..b7b802fe 100644
--- a/test/03_before_build/setup.py
+++ b/test/03_before_build/setup.py
@@ -1,24 +1,23 @@
 from setuptools import setup, Extension
 import sys, os
 
-if sys.argv[-1] != '--name':
-    # assert that the Python version as written to pythonversion.txt in the CIBW_BEFORE_BUILD step
-    # is the same one as is currently running.
-    version_file = 'c:\\pythonversion.txt' if sys.platform == 'win32' else '/tmp/pythonversion.txt'
-    with open(version_file) as f:
-        stored_version = f.read()
-    print('stored_version', stored_version)
-    print('sys.version', sys.version)
-    assert stored_version == sys.version
+# assert that the Python version as written to pythonversion.txt in the CIBW_BEFORE_BUILD step
+# is the same one as is currently running.
+version_file = 'c:\\pythonversion.txt' if sys.platform == 'win32' else '/tmp/pythonversion.txt'
+with open(version_file) as f:
+    stored_version = f.read()
+print('stored_version', stored_version)
+print('sys.version', sys.version)
+assert stored_version == sys.version
 
-    # check that the executable also was written
-    executable_file = 'c:\\pythonexecutable.txt' if sys.platform == 'win32' else '/tmp/pythonexecutable.txt'
-    with open(executable_file) as f:
-        stored_executable = f.read()
-    print('stored_executable', stored_executable)
-    print('sys.executable', sys.executable)
-    # windows/mac are case insensitive
-    assert os.path.realpath(stored_executable).lower() == os.path.realpath(sys.executable).lower()
+# check that the executable also was written
+executable_file = 'c:\\pythonexecutable.txt' if sys.platform == 'win32' else '/tmp/pythonexecutable.txt'
+with open(executable_file) as f:
+    stored_executable = f.read()
+print('stored_executable', stored_executable)
+print('sys.executable', sys.executable)
+# windows/mac are case insensitive
+assert os.path.realpath(stored_executable).lower() == os.path.realpath(sys.executable).lower()
 
 setup(
     name="spam",
diff --git a/test/04_build_skip/setup.py b/test/04_build_skip/setup.py
index e261e17c..94f3eb13 100644
--- a/test/04_build_skip/setup.py
+++ b/test/04_build_skip/setup.py
@@ -1,12 +1,11 @@
 from setuptools import setup, Extension
 import sys
 
-if sys.argv[-1] != '--name':
-    # explode if run on Python 2.7 or Python 3.4 (these should be skipped)
-    if sys.version_info[0:2] == (2, 7):
-        raise Exception('Python 2.7 should not be built')
-    if sys.version_info[0:2] == (3, 4):
-        raise Exception('Python 3.4 should be skipped')
+# explode if run on Python 2.7 or Python 3.4 (these should be skipped)
+if sys.version_info[0:2] == (2, 7):
+    raise Exception('Python 2.7 should not be built')
+if sys.version_info[0:2] == (3, 4):
+    raise Exception('Python 3.4 should be skipped')
 
 setup(
     name="spam",
diff --git a/test/05_environment/setup.py b/test/05_environment/setup.py
index 3278c944..61abd814 100644
--- a/test/05_environment/setup.py
+++ b/test/05_environment/setup.py
@@ -1,20 +1,19 @@
 from setuptools import setup, Extension
 import sys, os
 
-if sys.argv[-1] != '--name':
-    # explode if environment isn't correct, as set in CIBW_ENVIRONMENT
-    CIBW_TEST_VAR = os.environ.get('CIBW_TEST_VAR')
-    CIBW_TEST_VAR_2 = os.environ.get('CIBW_TEST_VAR_2')
-    PATH = os.environ.get('PATH')
+# explode if environment isn't correct, as set in CIBW_ENVIRONMENT
+CIBW_TEST_VAR = os.environ.get('CIBW_TEST_VAR')
+CIBW_TEST_VAR_2 = os.environ.get('CIBW_TEST_VAR_2')
+PATH = os.environ.get('PATH')
 
-    if CIBW_TEST_VAR != 'a b c':
-        raise Exception('CIBW_TEST_VAR should equal "a b c". It was "%s"' % CIBW_TEST_VAR)
-    if CIBW_TEST_VAR_2 != '1':
-        raise Exception('CIBW_TEST_VAR_2 should equal "1". It was "%s"' % CIBW_TEST_VAR_2)
-    if '/opt/cibw_test_path' not in PATH:
-        raise Exception('PATH should contain "/opt/cibw_test_path". It was "%s"' % PATH)
-    if '$PATH' in PATH:
-        raise Exception('$PATH should be expanded in PATH. It was "%s"' % PATH)
+if CIBW_TEST_VAR != 'a b c':
+    raise Exception('CIBW_TEST_VAR should equal "a b c". It was "%s"' % CIBW_TEST_VAR)
+if CIBW_TEST_VAR_2 != '1':
+    raise Exception('CIBW_TEST_VAR_2 should equal "1". It was "%s"' % CIBW_TEST_VAR_2)
+if '/opt/cibw_test_path' not in PATH:
+    raise Exception('PATH should contain "/opt/cibw_test_path". It was "%s"' % PATH)
+if '$PATH' in PATH:
+    raise Exception('$PATH should be expanded in PATH. It was "%s"' % PATH)
 
 
 setup(
diff --git a/test/06_docker_images/setup.py b/test/06_docker_images/setup.py
index d341d5ff..8084d9fe 100644
--- a/test/06_docker_images/setup.py
+++ b/test/06_docker_images/setup.py
@@ -2,11 +2,10 @@ import os, sys
 
 from setuptools import setup, Extension
 
-if sys.argv[-1] != '--name':
-    # check that we're running in the correct docker image as specified in the
-    # environment options CIBW_MANYLINUX1_*_IMAGE
-    if 'linux' in sys.platform and not os.path.exists('/dockcross'):
-        raise Exception('/dockcross directory not found. Is this test running in the correct docker image?')
+# check that we're running in the correct docker image as specified in the
+# environment options CIBW_MANYLINUX1_*_IMAGE
+if 'linux' in sys.platform and not os.path.exists('/dockcross'):
+    raise Exception('/dockcross directory not found. Is this test running in the correct docker image?')
 
 setup(
     name="spam",