diff --git a/rustfmt-core/rustfmt-lib/tests/target/issue-4029.rs b/rustfmt-core/rustfmt-lib/tests/target/issue-4029.rs
new file mode 100644
index 00000000000..314d0180588
--- /dev/null
+++ b/rustfmt-core/rustfmt-lib/tests/target/issue-4029.rs
@@ -0,0 +1,7 @@
+// issue #4029
+#[derive(Debug, Clone, Default Hash)]
+struct S;
+
+// issue #3898
+#[derive(Debug, Clone, Default,, Hash)]
+struct T;
diff --git a/rustfmt-core/rustfmt-lib/tests/target/issue-4115.rs b/rustfmt-core/rustfmt-lib/tests/target/issue-4115.rs
new file mode 100644
index 00000000000..0dd7bdbd04f
--- /dev/null
+++ b/rustfmt-core/rustfmt-lib/tests/target/issue-4115.rs
@@ -0,0 +1,8 @@
+#[derive(
+    A,
+    B,
+    C,
+    D,
+    // E,
+)]
+fn foo() {}