1 files changed, 15 insertions, 0 deletions
diff --git a/dottydoc/jvm/test/WhitelistedStdLib.scala b/dottydoc/jvm/test/WhitelistedStdLib.scala
index bbf0b4c6b..88dc67e99 100644
--- a/dottydoc/jvm/test/WhitelistedStdLib.scala
+++ b/dottydoc/jvm/test/WhitelistedStdLib.scala
@@ -14,4 +14,19 @@ class TestWhitelistedCollections extends DottyTest {
 
       assert(array.comment.get.body.length > 0)
     }
+
+  @Test def traitImmutableHasDocumentation =
+    checkFiles(WhitelistedStandardLib.files) { doc =>
+      val imm = doc
+        .packages("scala")
+        .children.find(_.path.mkString(".") == "scala.Immutable")
+        .get
+
+      assert(
+        imm.kind == "trait" && imm.name == "Immutable",
+        "Found wrong `Immutable`")
+      assert(
+        imm.comment.map(_.body).get.length > 0,
+        "Imm did not have a comment with length > 0")
+    }
 }