diff --git a/clippy_lints/src/methods/wrong_self_convention.rs b/clippy_lints/src/methods/wrong_self_convention.rs
index 6e2bcb113c2c..1773c26c251f 100644
--- a/clippy_lints/src/methods/wrong_self_convention.rs
+++ b/clippy_lints/src/methods/wrong_self_convention.rs
@@ -22,7 +22,7 @@ const CONVENTIONS: [(&[Convention], &[SelfKind]); 9] = [
     // Conversion using `to_` can use borrowed (non-Copy types) or owned (Copy types).
     // Source: https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv
     (&[Convention::StartsWith("to_"), Convention::NotEndsWith("_mut"), Convention::IsSelfTypeCopy(false), 
-    Convention::IsTraitItem(false)], &[SelfKind::Ref]),
+    Convention::IsTraitItem(false), Convention::ImplementsTrait(false)], &[SelfKind::Ref]),
     (&[Convention::StartsWith("to_"), Convention::NotEndsWith("_mut"), Convention::IsSelfTypeCopy(true), 
     Convention::IsTraitItem(false), Convention::ImplementsTrait(false)], &[SelfKind::Value]),
 ];
diff --git a/tests/ui/wrong_self_convention2.rs b/tests/ui/wrong_self_convention2.rs
index ae3a740d405d..18202ef29896 100644
--- a/tests/ui/wrong_self_convention2.rs
+++ b/tests/ui/wrong_self_convention2.rs
@@ -23,7 +23,7 @@ mod issue6983 {
     }
 
     struct FooNoCopy;
-    // trigger lint
+    // don't trigger
     impl ToU64 for FooNoCopy {
         fn to_u64(self) -> u64 {
             2
diff --git a/tests/ui/wrong_self_convention2.stderr b/tests/ui/wrong_self_convention2.stderr
deleted file mode 100644
index 0ca1a390974a..000000000000
--- a/tests/ui/wrong_self_convention2.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-error: methods with the following characteristics: (`to_*` and `self` type is not `Copy`) usually take `self` by reference
-  --> $DIR/wrong_self_convention2.rs:28:19
-   |
-LL |         fn to_u64(self) -> u64 {
-   |                   ^^^^
-   |
-   = note: `-D clippy::wrong-self-convention` implied by `-D warnings`
-   = help: consider choosing a less ambiguous name
-
-error: aborting due to previous error
-