diff --git a/src/xdist/plugin.py b/src/xdist/plugin.py
index fea8b5f..e25b231 100644
--- a/src/xdist/plugin.py
+++ b/src/xdist/plugin.py
@@ -6,11 +6,7 @@ import pytest
 
 
 def auto_detect_cpus():
-    try:
-        n = psutil.cpu_count(logical=False)
-    except NotImplementedError:
-        return 1
-    return n if n else 1
+    return psutil.cpu_count(logical=False) or psutil.cpu_count() or 1
 
 
 class AutoInt(int):
diff --git a/testing/test_plugin.py b/testing/test_plugin.py
index 419842d..31799e2 100644
--- a/testing/test_plugin.py
+++ b/testing/test_plugin.py
@@ -51,10 +51,7 @@ def test_auto_detect_cpus(testdir, monkeypatch):
     assert config.getoption("usepdb")
     assert config.getoption("numprocesses") == 0
 
-    def cpu_count_not_implemented(logical=True):
-        raise NotImplementedError
-
-    monkeypatch.setattr(psutil, "cpu_count", cpu_count_not_implemented)
+    monkeypatch.setattr(psutil, "cpu_count", lambda logical=True: None)
     config = testdir.parseconfigure("-nauto")
     assert config.getoption("numprocesses") == 1