diff --git a/.github/workflows/stdarch.yml b/.github/workflows/stdarch.yml
index 556c6444833..21b6a0d3a93 100644
--- a/.github/workflows/stdarch.yml
+++ b/.github/workflows/stdarch.yml
@@ -133,10 +133,10 @@ jobs:
       if: ${{ !matrix.cargo_runner }}
       run: |
         cd build_sysroot/sysroot_src/library/stdarch/
-        CHANNEL=release TARGET=x86_64-unknown-linux-gnu ../../../../cargo.sh test
+        CHANNEL=release TARGET=x86_64-unknown-linux-gnu CG_RUSTFLAGS="-Ainternal_features" ../../../../cargo.sh test
 
     - name: Run stdarch tests
       if: ${{ matrix.cargo_runner }}
       run: |
         cd build_sysroot/sysroot_src/library/stdarch/
-        STDARCH_TEST_EVERYTHING=1 CHANNEL=release CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER="${{ matrix.cargo_runner }}" TARGET=x86_64-unknown-linux-gnu ../../../../cargo.sh test -- --skip rtm --skip tbm --skip sse4a
+        STDARCH_TEST_EVERYTHING=1 CHANNEL=release CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER="${{ matrix.cargo_runner }}" TARGET=x86_64-unknown-linux-gnu CG_RUSTFLAGS="-Ainternal_features" ../../../../cargo.sh test -- --skip rtm --skip tbm --skip sse4a
diff --git a/failing-ui-tests.txt b/failing-ui-tests.txt
index 69f57036b01..fe0df3347bb 100644
--- a/failing-ui-tests.txt
+++ b/failing-ui-tests.txt
@@ -67,3 +67,6 @@ tests/ui/issues/issue-29948.rs
 tests/ui/panic-while-printing.rs
 tests/ui/enum-discriminant/get_discr.rs
 tests/ui/panics/nested_panic_caught.rs
+tests/ui/simd/intrinsic/generic-bswap-byte.rs
+tests/ui/const_prop/ice-issue-111353.rs
+tests/ui/process/println-with-broken-pipe.rs
diff --git a/test.sh b/test.sh
index 592997b8ab9..1054fdf7ea1 100755
--- a/test.sh
+++ b/test.sh
@@ -346,7 +346,9 @@ function test_rustc() {
     git checkout -- tests/ui/issues/auxiliary/issue-3136-a.rs # contains //~ERROR, but shouldn't be removed
 
     rm -r tests/ui/{abi*,extern/,unsized-locals/,proc-macro/,threads-sendsync/,thinlto/,borrowck/,chalkify/bugs/,test*,*lto*.rs,consts/const-float-bits-reject-conv.rs,consts/issue-miri-1910.rs} || true
-    rm tests/ui/mir/mir_heavy_promoted.rs # this tests is oom-killed in the CI.
+    rm tests/ui/mir/mir_heavy_promoted.rs # this test is oom-killed in the CI.
+    # Tests generating errors.
+    rm tests/ui/consts/const-eval/nonnull_as_ref_ub.rs tests/ui/consts/issue-94675.rs
     for test in $(rg --files-with-matches "thread|lto" tests/ui); do
       rm $test
     done
@@ -354,6 +356,8 @@ function test_rustc() {
     git checkout tests/ui/type-alias-impl-trait/auxiliary/cross_crate_ice.rs
     git checkout tests/ui/type-alias-impl-trait/auxiliary/cross_crate_ice2.rs
     git checkout tests/ui/macros/rfc-2011-nicer-assert-messages/auxiliary/common.rs
+    git checkout tests/ui/imports/ambiguous-1.rs
+    git checkout tests/ui/imports/ambiguous-4-extern.rs
 
     RUSTC_ARGS="$TEST_FLAGS -Csymbol-mangling-version=v0 -Zcodegen-backend="$(pwd)"/../target/"$CHANNEL"/librustc_codegen_gcc."$dylib_ext" --sysroot "$(pwd)"/../build_sysroot/sysroot"