diff --git a/tests/error/derives_forward.rs b/tests/error/derives_forward.rs
index d1d8a2dd..9e80a44a 100644
--- a/tests/error/derives_forward.rs
+++ b/tests/error/derives_forward.rs
@@ -27,8 +27,13 @@ derive_display!(EnumAttr);
 #[derive(Debug, Error)]
 #[error(forward)]
 enum EnumAttr {
-    A { source: Inner },
-    B { source: Inner },
+    A {
+        source: Inner,
+    },
+    B {
+        #[error(source)]
+        explicit_source: Inner,
+    },
 }
 
 #[test]
@@ -38,7 +43,7 @@ fn enum_attr() {
     };
 
     let err_b = EnumAttr::B {
-        source: Inner { source: SimpleErr },
+        explicit_source: Inner { source: SimpleErr },
     };
 
     assert!(err_a.source().is_some());
diff --git a/tests/error/nightly/derives_forward.rs b/tests/error/nightly/derives_forward.rs
index 591f0fe3..254bb487 100644
--- a/tests/error/nightly/derives_forward.rs
+++ b/tests/error/nightly/derives_forward.rs
@@ -49,8 +49,8 @@ enum EnumAttr {
         source: Inner,
     },
     B {
-        #[error(backtrace)]
-        source: Inner,
+        #[error(source, backtrace)]
+        explicit_source: Inner,
     },
 }
 
@@ -58,7 +58,7 @@ impl EnumAttr {
     fn get_source_backtrace(&self) -> &Backtrace {
         request_ref(match self {
             Self::A { source } => &source.source,
-            Self::B { source } => &source.source,
+            Self::B { explicit_source } => &explicit_source.source,
         })
         .unwrap()
     }
@@ -74,7 +74,7 @@ fn enum_attr() {
         },
     };
     let err_b = EnumAttr::B {
-        source: Inner {
+        explicit_source: Inner {
             source: BacktraceErr {
                 backtrace: Backtrace::force_capture(),
             },