diff --git a/tests/source/enum.rs b/tests/source/enum.rs
index 821bb0efd99..894eb8cbaec 100644
--- a/tests/source/enum.rs
+++ b/tests/source/enum.rs
@@ -165,3 +165,10 @@ enum State {
     TimedOut,
     Disconnected,
 }
+
+// #2190
+#[derive(Debug, Fail)]
+enum AnError {
+    #[fail(display = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")]
+    UnexpectedSingleToken { token: syn::Token },
+}
diff --git a/tests/target/enum.rs b/tests/target/enum.rs
index f3e8f2d4d6b..b60f5bcf1d6 100644
--- a/tests/target/enum.rs
+++ b/tests/target/enum.rs
@@ -215,3 +215,10 @@ enum State {
     TimedOut,
     Disconnected,
 }
+
+// #2190
+#[derive(Debug, Fail)]
+enum AnError {
+    #[fail(display = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")]
+    UnexpectedSingleToken { token: syn::Token },
+}