diff --git a/tests/ui/duplicate-source.rs b/tests/ui/duplicate-enum-source.rs
similarity index 61%
rename from tests/ui/duplicate-source.rs
rename to tests/ui/duplicate-enum-source.rs
index 2d599d1..15e579f 100644
--- a/tests/ui/duplicate-source.rs
+++ b/tests/ui/duplicate-enum-source.rs
@@ -1,13 +1,5 @@
 use thiserror::Error;
 
-#[derive(Error, Debug)]
-pub struct ErrorStruct {
-    #[source]
-    a: std::io::Error,
-    #[source]
-    b: anyhow::Error,
-}
-
 #[derive(Error, Debug)]
 pub enum ErrorEnum {
     Confusing {
diff --git a/tests/ui/duplicate-enum-source.stderr b/tests/ui/duplicate-enum-source.stderr
new file mode 100644
index 0000000..55d81be
--- /dev/null
+++ b/tests/ui/duplicate-enum-source.stderr
@@ -0,0 +1,5 @@
+error: duplicate #[source] attribute
+ --> $DIR/duplicate-enum-source.rs:8:9
+  |
+8 |         #[source]
+  |         ^^^^^^^^^
diff --git a/tests/ui/duplicate-source.stderr b/tests/ui/duplicate-source.stderr
deleted file mode 100644
index 6094a3d..0000000
--- a/tests/ui/duplicate-source.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: duplicate #[source] attribute
- --> $DIR/duplicate-source.rs:7:5
-  |
-7 |     #[source]
-  |     ^^^^^^^^^
-
-error: duplicate #[source] attribute
-  --> $DIR/duplicate-source.rs:16:9
-   |
-16 |         #[source]
-   |         ^^^^^^^^^
diff --git a/tests/ui/duplicate-struct-source.rs b/tests/ui/duplicate-struct-source.rs
new file mode 100644
index 0000000..569df8d
--- /dev/null
+++ b/tests/ui/duplicate-struct-source.rs
@@ -0,0 +1,11 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub struct ErrorStruct {
+    #[source]
+    a: std::io::Error,
+    #[source]
+    b: anyhow::Error,
+}
+
+fn main() {}
diff --git a/tests/ui/duplicate-struct-source.stderr b/tests/ui/duplicate-struct-source.stderr
new file mode 100644
index 0000000..76fc6f5
--- /dev/null
+++ b/tests/ui/duplicate-struct-source.stderr
@@ -0,0 +1,5 @@
+error: duplicate #[source] attribute
+ --> $DIR/duplicate-struct-source.rs:7:5
+  |
+7 |     #[source]
+  |     ^^^^^^^^^