diff --git a/ci-test.sh b/ci-test.sh
index 155f1f4..690a959 100644
--- a/ci-test.sh
+++ b/ci-test.sh
@@ -4,6 +4,9 @@ set -euo pipefail
 # Miri flags we apply everywhere
 DEFAULTFLAGS="-Zrandomize-layout -Zmiri-strict-provenance"
 
+# Some doctests don't work with the new trait solver.
+export RUSTDOCFLAGS="-Znext-solver=coherence"
+
 # make sure we keep using the current toolchain even in subdirs that have a toolchain file
 export RUSTUP_TOOLCHAIN=$(rustup show active-toolchain | head -n1 | cut -f 1 -d' ')
 
diff --git a/rust-version b/rust-version
index 671181b..bfdfa3a 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-nightly-2026-08-06
+nightly-2026-08-23