Fix robots.txt using the built-in template regression

Fixes #12071

2 files changed, 14 insertions, 1 deletions

diff --git a/hugolib/robotstxt_test.go b/hugolib/robotstxt_test.go
index 2035c235f..c901ce662 100644
--- a/hugolib/robotstxt_test.go
+++ b/hugolib/robotstxt_test.go
@@ -39,3 +39,16 @@ func TestRobotsTXTOutput(t *testing.T) {
 
 	b.AssertFileContent("public/robots.txt", "User-agent: Googlebot")
 }
+
+func TestRobotsTXTDefaultTemplate(t *testing.T) {
+	t.Parallel()
+	files := `
+-- hugo.toml --
+baseURL = "http://auth/bub/"
+enableRobotsTXT = true
+`
+
+	b := Test(t, files)
+
+	b.AssertFileContent("public/robots.txt", "User-agent: *")
+}
diff --git a/output/layouts/layout.go b/output/layouts/layout.go
index c05841ae3..b903e09ea 100644
--- a/output/layouts/layout.go
+++ b/output/layouts/layout.go
@@ -222,7 +222,7 @@ func resolvePageTemplate(d LayoutDescriptor) []string {
 	}
 
 	switch d.Kind {
-	case "robotsTXT":
+	case "robotstxt":
 		layouts = append(layouts, "_internal/_default/robots.txt")
 	case "sitemap":
 		layouts = append(layouts, "_internal/_default/sitemap.xml")