diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7047a6a4..647ef9c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -152,6 +152,8 @@ jobs:
           target: ${{ matrix.platform.rust-target }}
           profile: minimal
           default: true
+          # needed to correctly format errors, see #1865
+          components: rust-src
 
       - if: matrix.platform.os == 'ubuntu-latest'
         name: Prepare LD_LIBRARY_PATH (Ubuntu only)
diff --git a/tests/test_compile_error.rs b/tests/test_compile_error.rs
index 098ea6bb..d534b006 100644
--- a/tests/test_compile_error.rs
+++ b/tests/test_compile_error.rs
@@ -28,6 +28,7 @@ fn _test_compile_errors() {
     tests_rust_1_48(&t);
     tests_rust_1_49(&t);
     tests_rust_1_54(&t);
+    tests_rust_1_55(&t);
 
     #[rustversion::since(1.48)]
     fn tests_rust_1_48(t: &trybuild::TestCases) {
@@ -40,7 +41,6 @@ fn _test_compile_errors() {
     #[rustversion::since(1.49)]
     fn tests_rust_1_49(t: &trybuild::TestCases) {
         t.compile_fail("tests/ui/deprecations.rs");
-        t.compile_fail("tests/ui/invalid_pymethod_receiver.rs");
     }
     #[rustversion::before(1.49)]
     fn tests_rust_1_49(_t: &trybuild::TestCases) {}
@@ -51,10 +51,18 @@ fn _test_compile_errors() {
         t.compile_fail("tests/ui/invalid_result_conversion.rs");
         t.compile_fail("tests/ui/pyclass_send.rs");
         t.compile_fail("tests/ui/static_ref.rs");
+    }
+    #[rustversion::before(1.54)]
+    fn tests_rust_1_54(_t: &trybuild::TestCases) {}
+
+    #[rustversion::before(1.55)]
+    fn tests_rust_1_55(_t: &trybuild::TestCases) {}
+
+    #[rustversion::since(1.55)]
+    fn tests_rust_1_55(t: &trybuild::TestCases) {
+        t.compile_fail("tests/ui/invalid_pymethod_receiver.rs");
 
         #[cfg(Py_LIMITED_API)]
         t.compile_fail("tests/ui/abi3_nativetype_inheritance.rs");
     }
-    #[rustversion::before(1.54)]
-    fn tests_rust_1_54(_t: &trybuild::TestCases) {}
 }
diff --git a/tests/ui/abi3_nativetype_inheritance.stderr b/tests/ui/abi3_nativetype_inheritance.stderr
index b0756c69..f7c72666 100644
--- a/tests/ui/abi3_nativetype_inheritance.stderr
+++ b/tests/ui/abi3_nativetype_inheritance.stderr
@@ -1,11 +1,16 @@
 error[E0277]: the trait bound `PyDict: PyClass` is not satisfied
- --> $DIR/abi3_nativetype_inheritance.rs:5:1
-  |
-5 | #[pyclass(extends=PyDict)]
-  | ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `PyClass` is not implemented for `PyDict`
-  |
-  = note: required because of the requirements on the impl of `PyClassBaseType` for `PyDict`
-  = note: this error originates in the attribute macro `pyclass` (in Nightly builds, run with -Z macro-backtrace for more info)
+   --> $DIR/abi3_nativetype_inheritance.rs:5:1
+    |
+5   | #[pyclass(extends=PyDict)]
+    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `PyClass` is not implemented for `PyDict`
+    |
+   ::: $WORKSPACE/src/class/impl_.rs
+    |
+    | pub trait PyClassBaseType: Sized {
+    | -------------------------------- required by this bound in `PyClassBaseType`
+    |
+    = note: required because of the requirements on the impl of `PyClassBaseType` for `PyDict`
+    = note: this error originates in the attribute macro `pyclass` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `PyDict: PyClass` is not satisfied
    --> $DIR/abi3_nativetype_inheritance.rs:5:1
diff --git a/tests/ui/invalid_pymethod_receiver.stderr b/tests/ui/invalid_pymethod_receiver.stderr
index d6dc0ac6..b481fa1e 100644
--- a/tests/ui/invalid_pymethod_receiver.stderr
+++ b/tests/ui/invalid_pymethod_receiver.stderr
@@ -1,15 +1,19 @@
 error[E0277]: the trait bound `i32: From<&PyCell<MyClass>>` is not satisfied
- --> $DIR/invalid_pymethod_receiver.rs:8:43
-  |
-8 |     fn method_with_invalid_self_type(slf: i32, py: Python, index: u32) {}
-  |                                           ^^^ the trait `From<&PyCell<MyClass>>` is not implemented for `i32`
-  |
-  = help: the following implementations were found:
-            <i32 as From<NonZeroI32>>
-            <i32 as From<bool>>
-            <i32 as From<i16>>
-            <i32 as From<i8>>
-          and 2 others
-  = note: required because of the requirements on the impl of `Into<i32>` for `&PyCell<MyClass>`
-  = note: required because of the requirements on the impl of `TryFrom<&PyCell<MyClass>>` for `i32`
-  = note: required by `std::convert::TryFrom::try_from`
+   --> $DIR/invalid_pymethod_receiver.rs:8:43
+    |
+8   |     fn method_with_invalid_self_type(slf: i32, py: Python, index: u32) {}
+    |                                           ^^^ the trait `From<&PyCell<MyClass>>` is not implemented for `i32`
+    |
+    = help: the following implementations were found:
+              <i32 as From<NonZeroI32>>
+              <i32 as From<bool>>
+              <i32 as From<i16>>
+              <i32 as From<i8>>
+            and 2 others
+    = note: required because of the requirements on the impl of `Into<i32>` for `&PyCell<MyClass>`
+    = note: required because of the requirements on the impl of `TryFrom<&PyCell<MyClass>>` for `i32`
+note: required by `std::convert::TryFrom::try_from`
+   --> $DIR/mod.rs:477:5
+    |
+477 |     fn try_from(value: T) -> Result<Self, Self::Error>;
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^