Index: lnt/server/reporting/report.py
===================================================================
--- lnt/server/reporting/report.py
+++ lnt/server/reporting/report.py
@@ -9,9 +9,9 @@
 OrderAndHistory = namedtuple('OrderAndHistory', ['max_order', 'recent_orders'])
 
 
-def pairs(l):
-    """Make an iterable of all pairs of consecutive elements in l."""
-    return zip(l[:-1], l[1:])
+def pairs(lst):
+    """Make an iterable of all pairs of consecutive elements in lst."""
+    return zip(lst[:-1], lst[1:])
 
 
 # The hash color palette avoids green and red as these colours are already used
Index: lnt/testing/profile/perf.py
===================================================================
--- lnt/testing/profile/perf.py
+++ lnt/testing/profile/perf.py
@@ -34,9 +34,9 @@
             # Go through the data and convert counter values to percentages.
             for f in data['functions'].values():
                 fc = f['counters']
-                for l in f['data']:
-                    for k, v in l[0].items():
-                        l[0][k] = 100.0 * float(v) / fc[k]
+                for inst_info in f['data']:
+                    for k, v in inst_info[0].items():
+                        inst_info[0][k] = 100.0 * float(v) / fc[k]
                 for k, v in fc.items():
                     fc[k] = 100.0 * v / data['counters'][k]
 
Index: lnt/testing/profile/profilev1impl.py
===================================================================
--- lnt/testing/profile/profilev1impl.py
+++ lnt/testing/profile/profilev1impl.py
@@ -83,5 +83,5 @@
         return d
 
     def getCodeForFunction(self, fname):
-        for l in self.data['functions'][fname].get('data', []):
-            yield (l[0], l[1], l[2])
+        for inst_info in self.data['functions'][fname].get('data', []):
+            yield (inst_info[0], inst_info[1], inst_info[2])
Index: lnt/tests/test_suite.py
===================================================================
--- lnt/tests/test_suite.py
+++ lnt/tests/test_suite.py
@@ -534,8 +534,8 @@
                 fatal("Could not find CMake cache file: " + cache)
             cmake_flags += ['-C', cache]
 
-        for l in lines:
-            logger.info(l)
+        for line in lines:
+            logger.info(line)
 
         # Define compilers before specifying the cache files.
         early_defs = {}
Index: lnt/util/stats.py
===================================================================
--- lnt/util/stats.py
+++ lnt/util/stats.py
@@ -29,9 +29,9 @@
         return None
 
 
-def geometric_mean(l):
-    iPow = 1. / len(l)
-    return reduce(lambda a, b: a * b, [v ** iPow for v in l])
+def geometric_mean(values):
+    iPow = 1. / len(values)
+    return reduce(lambda a, b: a * b, [v ** iPow for v in values])
 
 
 def agg_mean(pairs):
Index: tests/testing/profilev2impl.py
===================================================================
--- tests/testing/profilev2impl.py
+++ tests/testing/profilev2impl.py
@@ -41,9 +41,9 @@
         fobj = io.BytesIO(s)
         p2 = ProfileV2.deserialize(fobj)
 
-        l = list(p2.getCodeForFunction('fn1'))
+        l1 = list(p2.getCodeForFunction('fn1'))
         l2 = self.test_data['functions']['fn1']['data']
-        self.assertEqual(l, l2)
+        self.assertEqual(l1, l2)
 
     def test_getFunctions(self):
         p = ProfileV2.upgrade(ProfileV1(copy.deepcopy(self.test_data)))