diff --git a/ports/espressif/boards/m5stack_stick_c/board.c b/ports/espressif/boards/m5stack_stick_c/board.c
index 88d0287419..ae29c9fa76 100644
--- a/ports/espressif/boards/m5stack_stick_c/board.c
+++ b/ports/espressif/boards/m5stack_stick_c/board.c
@@ -193,7 +193,7 @@ static bool pmic_init(void) {
     }
 
     // Reg: 12h
-    // Enable EXTENT, DCDC1, LDO2 and LDO3
+    // Enable CTRL_EXTEN, DCDC1, LDO2 and LDO3
     write_buf[0] = AXP192_DCDC13_LDO23_CTRL;
     write_buf[1] = AXP192_DCDC13_LDO23_CTRL_EXTEN |
         AXP192_DCDC13_LDO23_CTRL_LDO3 |
diff --git a/tests/basics/int_big1.py b/tests/basics/int_big1.py
index 01d58f7233..f6e4b61d1d 100644
--- a/tests/basics/int_big1.py
+++ b/tests/basics/int_big1.py
@@ -1,4 +1,4 @@
-# to test arbitrarily precision integers
+# to test arbitrary precision integers
 
 x = 1000000000000000000000000000000
 xn = -1000000000000000000000000000000
diff --git a/tests/basics/with_return.py b/tests/basics/with_return.py
index 6f36d9ad03..af65a5b984 100644
--- a/tests/basics/with_return.py
+++ b/tests/basics/with_return.py
@@ -30,7 +30,7 @@ def f():
                 return (i, j)
 print(f())
 
-# multiple for loops within nested with(s)
+# multiple for loops within nested with statements
 def f():
     with CtxMgr(1):
         for i in [1, 2]:
@@ -41,7 +41,7 @@ def f():
                             return (i, j, k, l)
 print(f())
 
-# multiple for loops that are optimised, and nested with(s)
+# multiple for loops that are optimised, and nested with statements
 def f():
     with CtxMgr(1):
         for i in range(1, 3):
diff --git a/tools/preprocess_frozen_modules.py b/tools/preprocess_frozen_modules.py
index 80ab547f3b..eb835961f6 100755
--- a/tools/preprocess_frozen_modules.py
+++ b/tools/preprocess_frozen_modules.py
@@ -21,10 +21,10 @@ def version_string(path=None, *, valid_semver=False):
         version = tag.strip().decode("utf-8", "strict")
     except subprocess.CalledProcessError:
         describe = subprocess.check_output("git describe --tags", shell=True, cwd=path)
-        tag, additional_commits, committish = (
+        tag, additional_commits, commit_ish = (
             describe.strip().decode("utf-8", "strict").rsplit("-", maxsplit=2)
         )
-        committish = committish[1:]
+        commit_ish = commit_ish[1:]
         if valid_semver:
             version_info = semver.parse_version_info(tag)
             if not version_info.prerelease:
@@ -33,12 +33,12 @@ def version_string(path=None, *, valid_semver=False):
                     + "-alpha.0.plus."
                     + additional_commits
                     + "+"
-                    + committish
+                    + commit_ish
                 )
             else:
-                version = tag + ".plus." + additional_commits + "+" + committish
+                version = tag + ".plus." + additional_commits + "+" + commit_ish
         else:
-            version = committish
+            version = commit_ish
     return version