diff --git a/psutil/_pslinux.py b/psutil/_pslinux.py
index caed859f8..5d5595feb 100644
--- a/psutil/_pslinux.py
+++ b/psutil/_pslinux.py
@@ -641,11 +641,10 @@ def cpu_count_cores():
                 except KeyError:
                     pass
                 current_info = {}
-            else:
+            elif line.startswith((b'physical id', b'cpu cores')):
                 # ongoing section
-                if line.startswith((b'physical id', b'cpu cores')):
-                    key, value = line.split(b'\t:', 1)
-                    current_info[key] = int(value)
+                key, value = line.split(b'\t:', 1)
+                current_info[key] = int(value)
 
     result = sum(mapping.values())
     return result or None  # mimic os.cpu_count()
diff --git a/psutil/tests/test_posix.py b/psutil/tests/test_posix.py
index 1b8b76dc0..6c8ac7f49 100755
--- a/psutil/tests/test_posix.py
+++ b/psutil/tests/test_posix.py
@@ -55,11 +55,10 @@ def ps(fmt, pid=None):
 
     if pid is not None:
         cmd.extend(['-p', str(pid)])
+    elif SUNOS or AIX:
+        cmd.append('-A')
     else:
-        if SUNOS or AIX:
-            cmd.append('-A')
-        else:
-            cmd.append('ax')
+        cmd.append('ax')
 
     if SUNOS:
         fmt = fmt.replace("start", "stime")
diff --git a/psutil/tests/test_process.py b/psutil/tests/test_process.py
index 966797d7a..35432b1db 100755
--- a/psutil/tests/test_process.py
+++ b/psutil/tests/test_process.py
@@ -660,17 +660,16 @@ def test_memory_maps(self):
                                 data = f.read()
                             if "%s (deleted)" % nt.path not in data:
                                 raise
-                else:
+                elif '64' not in os.path.basename(nt.path):
                     # XXX - On Windows we have this strange behavior with
                     # 64 bit dlls: they are visible via explorer but cannot
                     # be accessed via os.stat() (wtf?).
-                    if '64' not in os.path.basename(nt.path):
-                        try:
-                            st = os.stat(nt.path)
-                        except FileNotFoundError:
-                            pass
-                        else:
-                            assert stat.S_ISREG(st.st_mode), nt.path
+                    try:
+                        st = os.stat(nt.path)
+                    except FileNotFoundError:
+                        pass
+                    else:
+                        assert stat.S_ISREG(st.st_mode), nt.path
         for nt in ext_maps:
             for fname in nt._fields:
                 value = getattr(nt, fname)
diff --git a/psutil/tests/test_system.py b/psutil/tests/test_system.py
index a2c4ac64e..1e814b1e8 100755
--- a/psutil/tests/test_system.py
+++ b/psutil/tests/test_system.py
@@ -963,9 +963,8 @@ def test_sensors_battery(self):
             psutil.POWER_TIME_UNLIMITED,
         }:
             assert ret.secsleft >= 0
-        else:
-            if ret.secsleft == psutil.POWER_TIME_UNLIMITED:
-                assert ret.power_plugged
+        elif ret.secsleft == psutil.POWER_TIME_UNLIMITED:
+            assert ret.power_plugged
         assert isinstance(ret.power_plugged, bool)
 
     @pytest.mark.skipif(not HAS_SENSORS_FANS, reason="not supported")
diff --git a/pyproject.toml b/pyproject.toml
index a835733b2..04c4b291a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,7 +70,6 @@ ignore = [
     "PLR1702",  # Too many nested blocks (x > y)
     "PLR1704",  # Redefining argument with the local name `type_`
     "PLR2004",  # Magic value used in comparison, consider replacing X with a constant variable
-    "PLR5501",  # Use `elif` instead of `else` then `if`, to reduce indentation
     "PLR6301",  # Method `x` could be a function, class method, or static method
     "PLW0603",  # Using the global statement to update `lineno` is discouraged
     "PLW1514",  # `open` in text mode without explicit `encoding` argument