diff --git a/psutil/tests/test_windows.py b/psutil/tests/test_windows.py
index 3bf458079..cb2642d19 100755
--- a/psutil/tests/test_windows.py
+++ b/psutil/tests/test_windows.py
@@ -23,6 +23,7 @@
 import psutil
 from psutil import WINDOWS
 from psutil._compat import FileNotFoundError
+from psutil._compat import which
 from psutil._compat import super
 from psutil.tests import APPVEYOR
 from psutil.tests import GITHUB_ACTIONS
@@ -31,6 +32,7 @@
 from psutil.tests import PY3
 from psutil.tests import PYPY
 from psutil.tests import TOLERANCE_DISK_USAGE
+from psutil.tests import TOLERANCE_SYS_MEM
 from psutil.tests import PsutilTestCase
 from psutil.tests import mock
 from psutil.tests import retry_on_failure
@@ -62,6 +64,37 @@ class WindowsTestCase(PsutilTestCase):
     pass
 
 
+def powershell(cmd):
+    """Currently not used, but avalable just in case. Usage:
+
+    >>> powershell(
+        "Get-CIMInstance Win32_PageFileUsage | Select AllocatedBaseSize")
+    """
+    if not which("powershell.exe"):
+        raise unittest.SkipTest("powershell.exe not available")
+    cmdline = \
+        'powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive ' + \
+        '-NoProfile -WindowStyle Hidden -Command "%s"' % cmd
+    return sh(cmdline)
+
+
+def wmic(path, what, converter=int):
+    """Currently not used, but avalable just in case. Usage:
+
+    >>> wmic("Win32_OperatingSystem", "FreePhysicalMemory")
+    2134124534
+    """
+    out = sh("wmic path %s get %s" % (path, what)).strip()
+    data = "".join(out.splitlines()[1:]).strip()  # get rid of the header
+    if converter is not None:
+        if "," in what:
+            return tuple([converter(x) for x in data.split()])
+        else:
+            return converter(data)
+    else:
+        return data
+
+
 # ===================================================================
 # System APIs
 # ===================================================================
@@ -123,6 +156,12 @@ def test_total_phymem(self):
         self.assertEqual(int(w.TotalPhysicalMemory),
                          psutil.virtual_memory().total)
 
+    def test_free_phymem(self):
+        w = wmi.WMI().Win32_PerfRawData_PerfOS_Memory()[0]
+        self.assertAlmostEqual(
+            int(w.AvailableBytes), psutil.virtual_memory().free,
+            delta=TOLERANCE_SYS_MEM)
+
     # @unittest.skipIf(wmi is None, "wmi module is not installed")
     # def test__UPTIME(self):
     #     # _UPTIME constant is not public but it is used internally
diff --git a/scripts/internal/winmake.py b/scripts/internal/winmake.py
index bb8800519..466887c2c 100755
--- a/scripts/internal/winmake.py
+++ b/scripts/internal/winmake.py
@@ -383,7 +383,7 @@ def setup_dev_env():
     sh("%s -m pip install -U %s" % (PYTHON, " ".join(DEPS)))
 
 
-def check_flake8():
+def flake8():
     """Run flake8 against all py files"""
     py_files = subprocess.check_output("git ls-files")
     if PY3:
@@ -565,7 +565,7 @@ def main():
     sp.add_parser('install', help="build + install in develop/edit mode")
     sp.add_parser('install-git-hooks', help="install GIT pre-commit hook")
     sp.add_parser('install-pip', help="install pip")
-    sp.add_parser('check_flake8', help="run flake8 against all py files")
+    sp.add_parser('flake8', help="run flake8 against all py files")
     sp.add_parser('print-access-denied', help="print AD exceptions")
     sp.add_parser('print-api-speed', help="benchmark all API calls")
     sp.add_parser('setup-dev-env', help="install deps")