diff --git a/ci/ci.sh b/ci/ci.sh
index 0751f86da8..cca615bc66 100755
--- a/ci/ci.sh
+++ b/ci/ci.sh
@@ -150,8 +150,8 @@ case $HOST_TARGET in
     # Partially supported targets (tier 2)
     BASIC="empty_main integer heap_alloc libc-mem vec string btreemap" # ensures we have the basics: pre-main code, system allocator
     UNIX="hello panic/panic panic/unwind concurrency/simple atomic libc-mem libc-misc libc-random env num_cpus" # the things that are very similar across all Unixes, and hence easily supported there
-    TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal $BASIC $UNIX time hashmap random threadname pthread fs libc-pipe
-    TEST_TARGET=i686-unknown-freebsd   run_tests_minimal $BASIC $UNIX time hashmap random threadname pthread fs libc-pipe
+    TEST_TARGET=x86_64-unknown-freebsd run_tests_minimal $BASIC $UNIX time hashmap random fs libc-pipe
+    TEST_TARGET=i686-unknown-freebsd   run_tests_minimal $BASIC $UNIX time hashmap random fs libc-pipe
     TEST_TARGET=x86_64-unknown-illumos run_tests_minimal $BASIC $UNIX time hashmap random thread sync available-parallelism tls libc-pipe fs
     TEST_TARGET=x86_64-pc-solaris      run_tests_minimal $BASIC $UNIX time hashmap random thread sync available-parallelism tls libc-pipe fs
     TEST_TARGET=aarch64-linux-android  run_tests_minimal $BASIC $UNIX time hashmap random sync threadname pthread epoll eventfd
diff --git a/rust-version b/rust-version
index 9a4268fae3..4457f0e238 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-ad211ced81509462cdfe4c29ed10f97279a0acae
+252b07bba419a075acfa1fa85d66683e9623c281
diff --git a/src/shims/native_lib.rs b/src/shims/native_lib.rs
index 87be5a521d..8c9e1860f3 100644
--- a/src/shims/native_lib.rs
+++ b/src/shims/native_lib.rs
@@ -72,7 +72,7 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
             }
             // Functions with no declared return type (i.e., the default return)
             // have the output_type `Tuple([])`.
-            ty::Tuple(t_list) if t_list.len() == 0 => {
+            ty::Tuple(t_list) if t_list.is_empty() => {
                 unsafe { ffi::call::<()>(ptr, libffi_args.as_slice()) };
                 return interp_ok(ImmTy::uninit(dest.layout));
             }