--- a/tests/hghave.py	Fri Feb 11 16:52:48 2022 -0800
+++ b/tests/hghave.py	Tue Feb 15 20:24:46 2022 -0800
@@ -1137,11 +1137,11 @@
     return version and sv(_bytes2sys(version.group(0))) >= sv('2019.10.17')
 
 
-@check("rustfmt", "rustfmt tool at version nightly-2020-10-04")
+@check("rustfmt", "rustfmt tool at version nightly-2021-11-02")
 def has_rustfmt():
     # We use Nightly's rustfmt due to current unstable config options.
     return matchoutput(
-        '`rustup which --toolchain nightly-2020-10-04 rustfmt` --version',
+        '`rustup which --toolchain nightly-2021-11-02 rustfmt` --version',
         b'rustfmt',
     )