diff --git a/changes-entries/pr70295.txt b/changes-entries/pr70295.txt
index 7d3c73758b3..b9a24f78e5e 100644
--- a/changes-entries/pr70295.txt
+++ b/changes-entries/pr70295.txt
@@ -1,2 +1,2 @@
-  *) mod_remote_ip: Fix REMOTE_PORT in expressions and environment variables.
+  *) core: Fix REMOTE_PORT in expressions and environment variables.
      PR 70295. [Steve Bennett <S.Bennett lancaster.ac.uk>]
diff --git a/test/modules/core/test_013_expr_proto_version.py b/test/modules/core/test_013_expr_proto_version.py
new file mode 100644
index 00000000000..39fa43a05e0
--- /dev/null
+++ b/test/modules/core/test_013_expr_proto_version.py
@@ -0,0 +1,41 @@
+import pytest
+
+from pyhttpd.backport import not_backported
+from pyhttpd.conf import HttpdConf
+
+pytestmark = not_backported("r1410755",
+                            "SERVER_PROTOCOL_VERSION ap_expr variables",
+                            backported_in="2.4.72")
+
+
+# The variables do not parse on a server without them, so the restart
+# status is checked by each test rather than here.
+@pytest.fixture(scope='module')
+def restart_rc(env):
+    conf = HttpdConf(env, extras={
+        'base': """
+    ErrorDocument 404 "v=%{SERVER_PROTOCOL_VERSION} major=%{SERVER_PROTOCOL_VERSION_MAJOR} minor=%{SERVER_PROTOCOL_VERSION_MINOR}"
+    """
+    })
+    conf.add_vhost_test1()
+    conf.install()
+    return env.apache_restart()
+
+
+class TestExprProtoVersion:
+
+    def get(self, env, restart_rc, options):
+        assert restart_rc == 0
+        r = env.curl_get(env.mkurl("http", "test1", "/no-such-file"),
+                         options=options)
+        assert r.response, f"no response: {r.stderr}"
+        assert r.response["status"] == 404
+        return r.response["body"].decode().strip()
+
+    def test_core_013_01_http11(self, env, restart_rc):
+        assert self.get(env, restart_rc, ['--http1.1']) == \
+            "v=1001 major=1 minor=1"
+
+    def test_core_013_02_http10(self, env, restart_rc):
+        assert self.get(env, restart_rc, ['--http1.0']) == \
+            "v=1000 major=1 minor=0"