rk3141 · Sep 25, 2021 · Oct 2, 2021 · Oct 2, 2021 · Oct 2, 2021 · Oct 2, 2021
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
@@ -62,7 +62,34 @@ $ pytest -v
 Rust unit tests can be run with `cargo`:
 
 ```shell
-$ cargo test --all
+$ cargo test --workspace --exclude rustpython_wasm
+```
+
+Python unit tests can be run by compiling RustPython and running the test module:
+
+```shell
+$ cargo run --release -- -m test
+```
+
+There are a few test options that are especially useful:
+
+- `-j <n>` enables parallel testing (which is a lot faster), where `<n>` is the
+number of threads to be used, ideally the same as number of cores on your CPU.
+If you don't know, `-j 4` or `-j 8` are good options.
+- `-v` enables verbose mode, adding additional information about the tests being
+run.
+- `<test_name>` specifies a single test to run instead of running all tests.
+
+For example, to run all tests in parallel:
+
+```shell
+$ cargo run --release -- -m test -j 4
+```
+
+To run only `test_cmath` (located at `Lib/test/test_cmath`) verbosely:
+
+```shell
+$ cargo run --release -- -m test test_cmath -v
 ```
 
 ## Profiling

diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py
@@ -607,8 +607,6 @@ def test_b85_padding(self):
         eq(base64.b85decode(b'czAet'), b"xxxx")
         eq(base64.b85decode(b'czAetcmMzZ'), b"xxxxx\x00\x00\x00")
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_a85decode_errors(self):
         illegal = (set(range(32)) | set(range(118, 256))) - set(b' \t\n\r\v')
         for c in illegal:
@@ -644,8 +642,6 @@ def test_a85decode_errors(self):
         self.assertRaises(ValueError, base64.a85decode, b's8W-', adobe=False)
         self.assertRaises(ValueError, base64.a85decode, b's8W-"', adobe=False)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_b85decode_errors(self):
         illegal = list(range(33)) + \
                   list(b'"\',./:[\\]') + \