diff --git a/run-test.sh b/run-test.sh
index 8966a03..4f5ba0e 100755
--- a/run-test.sh
+++ b/run-test.sh
@@ -39,11 +39,6 @@ cp "$MIRI_LIB_SRC/../Cargo.lock" Cargo.lock
 # is just a re-export of the sysroot crate, so we don't get duplicate lang items.
 export MIRI_REPLACE_LIBRS_IF_NOT_TEST=1
 
-# core and std contain some modules that are also crates, so the feature flags are a bit all over
-# the place and we disable feature flag checking. (This matches what bootstrap does.)
-export RUSTFLAGS="--check-cfg=cfg(feature,values(any())) ${RUSTFLAGS:-}"
-export RUSTDOCFLAGS="--check-cfg=cfg(feature,values(any())) ${RUSTDOCFLAGS:-}"
-
 # run test
 export CARGO_TARGET_DIR=$(pwd)/target
 cargo miri test --manifest-path "library/$CRATE/Cargo.toml" "$@"
diff --git a/rust-version b/rust-version
index 8cf24df..73f5a2d 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-nightly-2024-05-18
+nightly-2024-05-23