diff --git a/examples/word-count-cls/setup.py b/examples/word-count-cls/setup.py
index 306fe0cc..c5a20629 100644
--- a/examples/word-count-cls/setup.py
+++ b/examples/word-count-cls/setup.py
@@ -27,7 +27,7 @@ class PyTest(TestCommand):
         raise SystemExit(errno)
 
 
-setup_requires = ['setuptools-rust>=0.6.1']
+setup_requires = ['setuptools-rust>=0.10.1']
 install_requires = []
 tests_require = install_requires + ['pytest', 'pytest-benchmark']
 
diff --git a/examples/word-count/setup.py b/examples/word-count/setup.py
index d2f3f6d7..e1476fb3 100644
--- a/examples/word-count/setup.py
+++ b/examples/word-count/setup.py
@@ -27,7 +27,7 @@ class PyTest(TestCommand):
         raise SystemExit(errno)
 
 
-setup_requires = ['setuptools-rust>=0.6.0']
+setup_requires = ['setuptools-rust>=0.10.1']
 install_requires = []
 tests_require = install_requires + ['pytest', 'pytest-benchmark']
 
diff --git a/guide/src/debugging.md b/guide/src/debugging.md
index bf7143bd..114d8942 100644
--- a/guide/src/debugging.md
+++ b/guide/src/debugging.md
@@ -2,7 +2,7 @@
 
 Pyo3's attributes, `#[class]`, `#[modinit]`, etc. are [procedural macros](https://doc.rust-lang.org/unstable-book/language-features/proc-macro.html), which means that rewrite the source of the annotated item. You can view the generated source with the following command, which also expands a few other things:
 
-```rust
+```bash
 cargo rustc -- -Z unstable-options --pretty=expanded > expanded.rs; rustfmt expanded.rs
 ```
 
@@ -10,6 +10,6 @@ cargo rustc -- -Z unstable-options --pretty=expanded > expanded.rs; rustfmt expa
 
 You can also debug classic `!`-macros by adding -Z trace-macros`:
 
-```rust
+```bash
 cargo rustc -- -Z unstable-options --pretty=expanded -Z trace-macros > expanded.rs; rustfmt expanded.rs
 ```
diff --git a/tests/test_dunder.rs b/tests/test_dunder.rs
index 3952c845..93141f40 100644
--- a/tests/test_dunder.rs
+++ b/tests/test_dunder.rs
@@ -449,13 +449,6 @@ fn dunder_dict_support() {
         inst.a = 1
         assert inst.a == 1
     "#);
-
-    py_run!(py, inst, r#"
-        import copy
-        inst2 = copy.deepcopy(inst)
-        inst2.a = 2
-        assert inst.a == 1
-    "#);
 }
 
 #[pyclass(weakref, dict)]
@@ -470,4 +463,3 @@ fn weakref_dunder_dict_support() {
     let inst = Py::new_ref(py, |t| WeakRefDunderDictSupport{token: t}).unwrap();
     py_run!(py, inst, "import weakref; assert weakref.ref(inst)() is inst; inst.a = 1; assert inst.a == 1");
 }
-