diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 848d13fae34e26..ab11122e57dd6a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -82,8 +82,8 @@ jobs:
           # CPython, so CIFuzz should be run only for code that is likely to be
           # merged into the main branch; compatibility with older branches may
           # be broken.
-          FUZZ_RELEVANT_FILES='(\.c$|\.h$|\.cpp$|^configure$|^\.github/workflows/build\.yml$|^Modules/_xxtestfuzz)'
-          if [ "$GITHUB_BASE_REF" = "main" ] && [ "$(git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qE $FUZZ_RELEVANT_FILES; echo $?)" ]; then
+          FUZZ_RELEVANT_FILES='(\.c$|\.h$|\.cpp$|^configure$|^Modules/_xxtestfuzz)'
+          if [ "$GITHUB_BASE_REF" = "main" ] && [ "$(git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qE $FUZZ_RELEVANT_FILES; echo $?)" -eq 0 ]; then
             # The tests are pretty slow so they are executed only for PRs
             # changing relevant files.
             echo "Run CIFuzz tests"
diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index 811557498bb30e..a63010aa248429 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -1,4 +1,7 @@
-"""Test case implementation"""
+"""Test case implementation
+
+This should not run CIFuzz
+"""
 
 import sys
 import functools
diff --git a/Modules/_sre/sre.c b/Modules/_sre/sre.c
index 07da5da13f70d3..c536df204215d7 100644
--- a/Modules/_sre/sre.c
+++ b/Modules/_sre/sre.c
@@ -535,6 +535,7 @@ state_fini(SRE_STATE* state)
 #define STATE_OFFSET(state, member)\
     (((char*)(member) - (char*)(state)->beginning) / (state)->charsize)
 
+// Now, CIFuzz should be executed.
 LOCAL(PyObject*)
 getslice(int isbytes, const void *ptr,
          PyObject* string, Py_ssize_t start, Py_ssize_t end)
diff --git a/README.rst b/README.rst
index 9cbadc8a5725b4..bb62e8aebe2a29 100644
--- a/README.rst
+++ b/README.rst
@@ -1,4 +1,4 @@
-This is Python version 3.13.0 alpha 0
+This should not run CIFuzz
 =====================================
 
 .. image:: https://github.com/python/cpython/workflows/Tests/badge.svg