diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ece52af23..b3c89ed09 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -97,6 +97,7 @@ rust-nightly:
     # The --cfg allows us to write #![cfg_attr(ci_arti_nightly, allow(clippy::needless_borrow))]
     # and similar, for when nightly clippy has false positives.  (There is no builtin
     # cfg flag for nightly, and a cargo "feature" would be bad with --all-features.)
+    - (echo; cat clippy-nightly.toml) >>clippy.toml
     - cargo clippy --all-features --tests -- --cfg ci_arti_nightly -D clippy::dbg_macro -D clippy::print_stdout -D clippy::print_stderr
     - RUSTDOCFLAGS="-Dwarnings" cargo doc --all-features --document-private-items --no-deps
   tags:
diff --git a/clippy-nightly.toml b/clippy-nightly.toml
new file mode 100644
index 000000000..a0df6e2c4
--- /dev/null
+++ b/clippy-nightly.toml
@@ -0,0 +1,6 @@
+# Config options appended to clippy.toml when we run Nightly clippy
+#
+# We must edit the tree, this way, sadly:
+#   https://github.com/rust-lang/rust-clippy/issues/8973
+
+allow-dbg-in-tests = true