diff --git a/.github/workflows/push_c.yml b/.github/workflows/c.yml
similarity index 90%
rename from .github/workflows/push_c.yml
rename to .github/workflows/c.yml
index b1838a0..2a8d8e4 100644
--- a/.github/workflows/push_c.yml
+++ b/.github/workflows/c.yml
@@ -2,11 +2,15 @@ name: Test for C implementations
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     name: Run test
-    runs-on: ubuntu-22.04
+    runs-on: self-hosted
+    container:
+      image: buildpack-deps:jammy
     defaults:
       run:
         working-directory: ./test
diff --git a/.github/workflows/push_cpp.yml b/.github/workflows/cpp.yml
similarity index 83%
rename from .github/workflows/push_cpp.yml
rename to .github/workflows/cpp.yml
index cfc56e1..f5daf9a 100644
--- a/.github/workflows/push_cpp.yml
+++ b/.github/workflows/cpp.yml
@@ -2,11 +2,15 @@ name: Test for C++ implementations
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     name: Run test
-    runs-on: ubuntu-22.04
+    runs-on: self-hosted
+    container:
+      image: buildpack-deps:jammy
     defaults:
       run:
         working-directory: ./test
diff --git a/.github/workflows/push_haskell.yml b/.github/workflows/haskell.yml
similarity index 89%
rename from .github/workflows/push_haskell.yml
rename to .github/workflows/haskell.yml
index bff0775..b3da9d0 100644
--- a/.github/workflows/push_haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -2,11 +2,15 @@ name: Test for Haskell implementations
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     name: Run test
-    runs-on: ubuntu-22.04
+    runs-on: self-hosted
+    container:
+      image: haskell:9
     defaults:
       run:
         working-directory: ./test
@@ -42,4 +46,4 @@ jobs:
         run: ./test_maker .test/nsy.test
       - name: Run test
         run: ./test ../nsy/haskell/nsy
-        timeout-minutes: 5
\ No newline at end of file
+        timeout-minutes: 5
diff --git a/.github/workflows/push_javascript.yml b/.github/workflows/javascript.yml
similarity index 71%
rename from .github/workflows/push_javascript.yml
rename to .github/workflows/javascript.yml
index ceef8f4..66acca4 100644
--- a/.github/workflows/push_javascript.yml
+++ b/.github/workflows/javascript.yml
@@ -2,18 +2,23 @@ name: Test for JavaScript implementations
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     name: Run test
-    runs-on: ubuntu-22.04
+    runs-on: self-hosted
+    container:
+      image: buildpack-deps:jammy
     defaults:
       run:
         working-directory: ./test
     steps:
       - name: Install Bun
-        run: curl -fsSL https://bun.sh/install | bash
-        working-directory: ./
+        uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
       - uses: actions/checkout@v4
         with:
           submodules: true
@@ -21,7 +26,7 @@ jobs:
         run: gcc -o test_maker test_maker.c
 
       - name: Build object program
-        run: $BUN_INSTALL/bin/bun build hd.js --compile --outfile hd
+        run: bun build hd.js --compile --outfile hd
         working-directory: ./hd/javascript
       - name: Build host program
         run: ./test_maker .test/hd.test
diff --git a/.github/workflows/pr_c.yml b/.github/workflows/pr_c.yml
deleted file mode 100644
index 7c69913..0000000
--- a/.github/workflows/pr_c.yml
+++ /dev/null
@@ -1,69 +0,0 @@
-name: Test for C implementations
-on:
-  pull_request:
-    branches: [main]
-
-jobs:
-  prepare:
-    name: Prepare test
-    runs-on: self-hosted
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Build test maker
-        run: gcc -o test_maker test_maker.c
-
-  test-btn:
-    name: Run buntang test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: make all
-        working-directory: ./btn/c
-      - name: Build host program
-        run: ./test_maker .test/btn.test
-      - name: Run test
-        run: ./test ../btn/c/btn
-        timeout-minutes: 5
-
-  test-hd:
-    name: Run heading test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: make all
-        working-directory: ./hd/c
-      - name: Build host program
-        run: ./test_maker .test/hd.test
-      - name: Run test
-        run: ./test ../hd/c/hd
-        timeout-minutes: 5
-
-  test-nsy:
-    name: Run noisy test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: make all
-        working-directory: ./nsy/c
-      - name: Build host program
-        run: ./test_maker .test/nsy.test
-      - name: Run test
-        run: ./test ../nsy/c/nsy
-        timeout-minutes: 5
diff --git a/.github/workflows/pr_cpp.yml b/.github/workflows/pr_cpp.yml
deleted file mode 100644
index 6c13bfd..0000000
--- a/.github/workflows/pr_cpp.yml
+++ /dev/null
@@ -1,35 +0,0 @@
-name: Test for C++ implementations
-on:
-  pull_request:
-    branches: [main]
-
-jobs:
-  prepare:
-    name: Prepare test
-    runs-on: self-hosted
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Build test maker
-        run: gcc -o test_maker test_maker.c
-
-  test-hd:
-    name: Run heading test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: make all
-        working-directory: ./hd/cpp
-      - name: Build host program
-        run: ./test_maker .test/hd.test
-      - name: Run test
-        run: ./test ../hd/cpp/hd
-        timeout-minutes: 5
diff --git a/.github/workflows/pr_haskell.yml b/.github/workflows/pr_haskell.yml
deleted file mode 100644
index 9f79c74..0000000
--- a/.github/workflows/pr_haskell.yml
+++ /dev/null
@@ -1,69 +0,0 @@
-name: Test for Haskell implementations
-on:
-  pull_request:
-    branches: [main]
-
-jobs:
-  prepare:
-    name: Prepare test
-    runs-on: self-hosted
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Build test maker
-        run: gcc -o test_maker test_maker.c
-
-  test-btn:
-    name: Run buntang test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: ghc btn.hs
-        working-directory: ./btn/haskell
-      - name: Build host program
-        run: ./test_maker .test/btn.test
-      - name: Run test
-        run: ./test ../btn/haskell/btn
-        timeout-minutes: 5
-
-  test-hd:
-    name: Run heading test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: ghc hd.hs
-        working-directory: ./hd/haskell
-      - name: Build host program
-        run: ./test_maker .test/hd.test
-      - name: Run test
-        run: ./test ../hd/haskell/hd
-        timeout-minutes: 5
-
-  test-nsy:
-    name: Run noisy test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: ghc nsy.hs
-        working-directory: ./nsy/haskell
-      - name: Build host program
-        run: ./test_maker .test/nsy.test
-      - name: Run test
-        run: ./test ../nsy/haskell/nsy
-        timeout-minutes: 5
diff --git a/.github/workflows/pr_javascript.yml b/.github/workflows/pr_javascript.yml
deleted file mode 100644
index 022a36c..0000000
--- a/.github/workflows/pr_javascript.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-name: Test for JavaScript implementations
-on:
-  pull_request:
-    branches: [main]
-
-jobs:
-  prepare:
-    name: Prepare test
-    runs-on: self-hosted
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Build test maker
-        run: gcc -o test_maker test_maker.c
-        working-directory: ./test
-
-  test:
-    name: Run heading test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: $BUN_INSTALL/bin/bun build hd.js --compile --outfile hd
-        working-directory: ./hd/javascript
-      - name: Build host program
-        run: ./test_maker .test/hd.test
-      - name: Run test
-        run: ./test ../hd/javascript/hd
-        timeout-minutes: 5
diff --git a/.github/workflows/pr_python.yml b/.github/workflows/pr_python.yml
deleted file mode 100644
index 1534fda..0000000
--- a/.github/workflows/pr_python.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-name: Test for Python implementations
-on:
-  pull_request:
-    branches: [main]
-
-jobs:
-  prepare:
-    name: Prepare test
-    runs-on: self-hosted
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Build test maker
-        run: gcc -o test_maker test_maker.c
-
-  test-btn:
-    name: Run buntang test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build host program
-        run: ./test_maker .test/btn.test
-      - name: Run test
-        run: ./test "python3 ../btn/python/btn.py"
-        timeout-minutes: 5
-
-  test-nsy:
-    name: Run noisy test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build host program
-        run: ./test_maker .test/nsy.test
-      - name: Run test
-        run: ./test "python3 ../nsy/python/nsy.py"
-        timeout-minutes: 5
diff --git a/.github/workflows/pr_rust.yml b/.github/workflows/pr_rust.yml
deleted file mode 100644
index babe496..0000000
--- a/.github/workflows/pr_rust.yml
+++ /dev/null
@@ -1,35 +0,0 @@
-name: Test for Rust implementations
-on:
-  pull_request:
-    branches: [main]
-
-jobs:
-  prepare:
-    name: Prepare test
-    runs-on: self-hosted
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Build test maker
-        run: gcc -o test_maker test_maker.c
-
-  test:
-    name: Run heading test
-    runs-on: self-hosted
-    needs: prepare
-    defaults:
-      run:
-        working-directory: ./test
-    steps:
-      - name: Build object program
-        run: rustc hd.rs -C debuginfo=0 -C opt-level=z -C strip=symbols -o hd
-        working-directory: ./hd/rust
-      - name: Build host program
-        run: ./test_maker .test/hd.test
-      - name: Run test
-        run: ./test ../hd/rust/hd
-        timeout-minutes: 5
diff --git a/.github/workflows/push_python.yml b/.github/workflows/python.yml
similarity index 85%
rename from .github/workflows/push_python.yml
rename to .github/workflows/python.yml
index d50dc03..f587328 100644
--- a/.github/workflows/push_python.yml
+++ b/.github/workflows/python.yml
@@ -2,11 +2,15 @@ name: Test for Python implementations
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     name: Run test
-    runs-on: ubuntu-22.04
+    runs-on: self-hosted
+    container:
+      image: buildpack-deps:jammy
     defaults:
       run:
         working-directory: ./test
diff --git a/.github/workflows/push_rust.yml b/.github/workflows/rust.yml
similarity index 86%
rename from .github/workflows/push_rust.yml
rename to .github/workflows/rust.yml
index 0673592..805c813 100644
--- a/.github/workflows/push_rust.yml
+++ b/.github/workflows/rust.yml
@@ -2,11 +2,15 @@ name: Test for Rust implementations
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   test:
     name: Run test
-    runs-on: ubuntu-22.04
+    runs-on: self-hosted
+    container:
+      image: buildpack-deps:jammy
     defaults:
       run:
         working-directory: ./test