diff --git a/.github/actions/with-docker/action.yml b/.github/actions/with-docker/action.yml
index 4768fc740..a4f6b589c 100644
--- a/.github/actions/with-docker/action.yml
+++ b/.github/actions/with-docker/action.yml
@@ -17,6 +17,8 @@ runs:
       TAG=runtimeverificationinc/${CONTAINER_NAME}
       K_COMMIT=$(grep -Po '[0-9.]+' ./deps/k_release)
       UV_VERSION=$(cat deps/uv_release)
+      RUST_TOOLCHAIN=$(sed -nE 's/^channel = "([^"]+)"/\1/p' rust-toolchain.toml)
+      test -n "${RUST_TOOLCHAIN}"
 
       USER=github-user
       GROUP=${USER}
@@ -30,6 +32,7 @@ runs:
         --build-arg GROUP=${GROUP}           \
         --build-arg USER_ID=${USER_ID}       \
         --build-arg GROUP_ID=${GROUP_ID}     \
+        --build-arg RUST_TOOLCHAIN=${RUST_TOOLCHAIN} \
         --build-arg UV_VERSION=${UV_VERSION}
 
       docker run                          \
diff --git a/.github/workflows/Dockerfile b/.github/workflows/Dockerfile
index fabcdd03a..54cc1ad44 100644
--- a/.github/workflows/Dockerfile
+++ b/.github/workflows/Dockerfile
@@ -10,13 +10,14 @@ ARG USER=user
 ARG GROUP
 ARG USER_ID=1000
 ARG GROUP_ID=1000
+ARG RUST_TOOLCHAIN=nightly-2024-11-29
 RUN groupadd -g ${GROUP_ID} ${GROUP} && useradd -m -u ${USER_ID} -s /bin/sh -g ${GROUP} ${USER}
 USER ${USER}:${GROUP}
 
 ENV PATH="/home/${USER}/.cargo/bin:${PATH}"
 RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
-RUN rustup toolchain install nightly-2024-11-29 --component llvm-tools --component rustc-dev --component rust-src
-RUN rustup default nightly-2024-11-29-x86_64-unknown-linux-gnu
+RUN rustup toolchain install ${RUST_TOOLCHAIN} --component llvm-tools --component rustc-dev --component rust-src
+RUN rustup default ${RUST_TOOLCHAIN}
 
 RUN mkdir /home/${USER}/workspace
 WORKDIR /home/${USER}/workspace
diff --git a/.github/workflows/test-stable-mir-ui.yml b/.github/workflows/test-stable-mir-ui.yml
new file mode 100644
index 000000000..71fa8a40d
--- /dev/null
+++ b/.github/workflows/test-stable-mir-ui.yml
@@ -0,0 +1,123 @@
+name: 'Stable MIR UI Tests'
+on:
+  workflow_dispatch:
+    inputs:
+      test-filter:
+        description: 'Passed as -k to pytest (empty = all tests)'
+        type: string
+        default: ''
+      update-skip:
+        description: 'Enable --update-skip mode to shrink skip.txt'
+        type: boolean
+        default: false
+      timeout:
+        description: 'Per-test timeout in seconds'
+        type: string
+        default: '300'
+
+jobs:
+  stable-mir-ui-tests:
+    name: 'Stable MIR UI Tests'
+    runs-on: [self-hosted, linux, normal]
+    env:
+      CONTAINER_NAME: mir-ui-ci-${{ github.sha }}
+    steps:
+      - name: 'Check out code'
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.JENKINS_GITHUB_PAT }}
+          submodules: recursive
+
+      - name: 'Check out Rust repo'
+        uses: actions/checkout@v4
+        with:
+          repository: rust-lang/rust
+          ref: a2545fd6fc66b4323f555223a860c451885d1d2b
+          path: rust
+          fetch-depth: 1
+
+      - name: 'Set up Docker'
+        uses: ./.github/actions/with-docker
+        with:
+          container-name: ${{ env.CONTAINER_NAME }}
+
+      - name: 'Copy Rust repo into container'
+        run: docker cp rust ${{ env.CONTAINER_NAME }}:/home/github-user/workspace/rust
+
+      - name: 'Build stable-mir-json'
+        run: docker exec --user github-user ${{ env.CONTAINER_NAME }} make stable-mir-json
+
+      - name: 'Build kmir'
+        run: docker exec --user github-user ${{ env.CONTAINER_NAME }} make build
+
+      - name: 'Run stable-mir-ui tests'
+        env:
+          INPUT_FILTER: ${{ inputs.test-filter }}
+          INPUT_TIMEOUT: ${{ inputs.timeout }}
+          INPUT_UPDATE_SKIP: ${{ inputs.update-skip }}
+        run: |
+          test_args=(--timeout="${INPUT_TIMEOUT}")
+          if [ -n "${INPUT_FILTER}" ]; then
+            test_args+=(-k "${INPUT_FILTER}")
+          fi
+          if [ "${INPUT_UPDATE_SKIP}" = "true" ]; then
+            test_args+=(--update-skip)
+          fi
+          printf -v test_args_escaped '%q ' "${test_args[@]}"
+          docker exec --user github-user \
+            --env RUST_DIR_ROOT=rust \
+            ${{ env.CONTAINER_NAME }} \
+            make test-stable-mir-ui "TEST_ARGS=${test_args_escaped}"
+
+      - name: 'Copy proof artifacts from container'
+        if: failure()
+        run: |
+          rm -rf .github-artifacts/proof-artifacts
+          mkdir -p .github-artifacts/proof-artifacts
+          docker exec --user github-user ${{ env.CONTAINER_NAME }} bash -lc '
+            set -euo pipefail
+            artifact_dir=/home/github-user/workspace/.github-artifacts/proof-artifacts
+            rm -rf "$artifact_dir"
+            mkdir -p "$artifact_dir"
+            find /tmp -type f \( -name show.txt -o -path "*/smir.json" \) -print0 | while IFS= read -r -d "" path; do
+              case_dir="$(dirname "$path")"
+              if [ "$(basename "$path")" = "smir.json" ]; then
+                case_dir="$(dirname "$case_dir")"
+              fi
+              rel="${case_dir#/tmp/}"
+              dest="$artifact_dir/$rel"
+              rm -rf "$dest"
+              mkdir -p "$(dirname "$dest")"
+              cp -R "$case_dir" "$dest"
+            done
+          '
+          docker cp ${{ env.CONTAINER_NAME }}:/home/github-user/workspace/.github-artifacts/proof-artifacts/. .github-artifacts/proof-artifacts/ || true
+
+      - name: 'Upload proof artifacts on failure'
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: proof-artifacts
+          path: .github-artifacts/proof-artifacts
+          if-no-files-found: ignore
+
+      - name: 'Copy updated skip.txt from container'
+        if: ${{ always() && inputs.update-skip }}
+        run: |
+          rm -rf .github-artifacts/update-skip
+          mkdir -p .github-artifacts/update-skip
+          docker cp \
+            ${{ env.CONTAINER_NAME }}:/home/github-user/workspace/kmir/src/tests/external/data/stable-mir-ui/skip.txt \
+            .github-artifacts/update-skip/skip.txt || true
+
+      - name: 'Upload updated skip.txt'
+        if: inputs.update-skip
+        uses: actions/upload-artifact@v4
+        with:
+          name: updated-skip-txt
+          path: .github-artifacts/update-skip/skip.txt
+          if-no-files-found: ignore
+
+      - name: 'Tear down Docker'
+        if: always()
+        run: docker stop --time 0 ${{ env.CONTAINER_NAME }}