diff --git a/coverage_comment/settings.py b/coverage_comment/settings.py
index 4610d891..21a55a8b 100644
--- a/coverage_comment/settings.py
+++ b/coverage_comment/settings.py
@@ -125,6 +125,13 @@ def GITHUB_PR_NUMBER(self) -> int | None:
             return int(self.GITHUB_REF.split("/")[2])
         return None
 
+    @property
+    def GITHUB_BRANCH_NAME(self) -> str | None:
+        # "refs/head/my_branch_name"
+        if "heads" in self.GITHUB_REF:
+            return self.GITHUB_REF.split("/", 2)[2]
+        return None
+
     # We need to type environ as a MutableMapping because that's what
     # os.environ is, and just saying `dict[str, str]` is not enough to make
     # mypy happy
diff --git a/tests/unit/test_settings.py b/tests/unit/test_settings.py
index edab1716..d45f6ba9 100644
--- a/tests/unit/test_settings.py
+++ b/tests/unit/test_settings.py
@@ -130,6 +130,17 @@ def test_config__GITHUB_PR_NUMBER(config, github_ref, github_pr_number):
     assert config(GITHUB_REF=github_ref).GITHUB_PR_NUMBER == github_pr_number
 
 
+@pytest.mark.parametrize(
+    "github_ref, github_branch_name",
+    [
+        ("refs/pull/2/merge", None),
+        ("refs/heads/a/b", "a/b"),
+    ],
+)
+def test_config__GITHUB_BRANCH_NAME(config, github_ref, github_branch_name):
+    assert config(GITHUB_REF=github_ref).GITHUB_BRANCH_NAME == github_branch_name
+
+
 def test_config__from_environ__error():
     with pytest.raises(ValueError):
         settings.Config.from_environ({"COMMENT_FILENAME": "/a"})