diff --git a/cabal-testsuite/PackageTests/Help/HelpPrintsConfigFile/help-prints-config-file.out b/cabal-testsuite/PackageTests/Help/HelpPrintsConfigFile/help-prints-config-file.out
new file mode 100644
index 00000000000..8f859e4c506
--- /dev/null
+++ b/cabal-testsuite/PackageTests/Help/HelpPrintsConfigFile/help-prints-config-file.out
@@ -0,0 +1 @@
+# cabal --help
diff --git a/cabal-testsuite/PackageTests/Help/HelpPrintsConfigFile/help-prints-config-file.test.hs b/cabal-testsuite/PackageTests/Help/HelpPrintsConfigFile/help-prints-config-file.test.hs
new file mode 100644
index 00000000000..e725142bc24
--- /dev/null
+++ b/cabal-testsuite/PackageTests/Help/HelpPrintsConfigFile/help-prints-config-file.test.hs
@@ -0,0 +1,25 @@
+-- Andreas Abel, 2024-01-13
+--
+-- Ensure that the last line of the help text is the name of the config file.
+-- This invariant is used by clients such as the Haskell setup github action.
+-- See: https://github.com/haskell-actions/setup/pull/63
+
+import Distribution.Utils.String (trim)
+import Test.Cabal.Prelude
+
+main = cabalTest $ do
+  env <- getTestEnv
+  res <- cabal' "--help" []
+
+  -- The end of the help text should be something like:
+  --
+  -- > You can edit the cabal configuration file to set defaults:
+  -- >   <<HOME>>/.cabal/config
+  --
+  -- So trimming the last line will give us the name of the config file.
+  let configFile = trim . last . lines . resultOutput $ res
+
+  -- Verify that this is indeed the config file.
+  assertEqual "Last line of help text should be name of the config file"
+    (testUserCabalConfigFile env)
+    configFile