diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index cff567a..c719d16 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,12 +19,13 @@ jobs:
         run: mv test/* .
 
       - name: Use the action
+        id: cmake-action
         uses: ./
 
       - name: Try to test the project
         id: failed-step
         continue-on-error: true
-        run: ctest --test-dir build --output-on-failure --no-tests=error -R hello_world ${{ matrix.os == 'windows' && '-C Debug' || '' }}
+        run: ctest --test-dir ${{ steps.cmake-action.outputs.build-dir }} --output-on-failure --no-tests=error -R hello_world ${{ matrix.os == 'windows' && '-C Debug' || '' }}
 
       - name: Check on success
         if: steps.failed-step.outcome == 'success'
@@ -32,8 +33,8 @@ jobs:
 
       - name: Build and test the project
         run: |
-          cmake --build build
-          ctest --test-dir build --output-on-failure --no-tests=error -R hello_world ${{ matrix.os == 'windows' && '-C Debug' || '' }}
+          cmake --build ${{ steps.cmake-action.outputs.build-dir }}
+          ctest --test-dir ${{ steps.cmake-action.outputs.build-dir }} --output-on-failure --no-tests=error -R hello_world ${{ matrix.os == 'windows' && '-C Debug' || '' }}
 
   specified-dir-usage:
     runs-on: ubuntu-latest
@@ -42,6 +43,7 @@ jobs:
         uses: actions/checkout@v3.5.3
 
       - name: Use the action with specified directories
+        id: cmake-action
         uses: ./
         with:
           source-dir: test
@@ -53,8 +55,8 @@ jobs:
 
       - name: Build and test the project
         run: |
-          cmake --build output
-          ctest --test-dir output --output-on-failure --no-tests=error -R hello_world
+          cmake --build ${{ steps.cmake-action.outputs.build-dir }}
+          ctest --test-dir ${{ steps.cmake-action.outputs.build-dir }} --output-on-failure --no-tests=error -R hello_world
 
   run-build-usage:
     runs-on: ubuntu-latest
@@ -63,6 +65,7 @@ jobs:
         uses: actions/checkout@v3.5.3
 
       - name: Use the action with run build enabled
+        id: cmake-action
         uses: ./
         with:
           source-dir: test
@@ -70,7 +73,7 @@ jobs:
           build-args: --target test_c --target test_cpp
 
       - name: Test the project
-        run: ctest --test-dir test/build --output-on-failure --no-tests=error -R test
+        run: ctest --test-dir ${{ steps.cmake-action.outputs.build-dir }} --output-on-failure --no-tests=error -R test
 
   run-test-usage:
     runs-on: ubuntu-latest
diff --git a/README.md b/README.md
index 2ee3227..9ab76aa 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,12 @@ For more information, refer to [action.yml](./action.yml) and the [GitHub Action
 
 > **Note**: All inputs are optional.
 
+### Outputs
+
+| Name | Value Type | Description |
+| --- | --- | --- |
+| `build-dir` | Path | The build directory of the CMake project. |
+
 ### Examples
 
 ```yaml
diff --git a/action.yml b/action.yml
index 51a8bd8..8332bff 100644
--- a/action.yml
+++ b/action.yml
@@ -46,11 +46,15 @@ inputs:
   test-args:
     description: Additional arguments to pass during the CTest run
     required: false
+outputs:
+  build-dir:
+    description: The build directory of the CMake project
+    value: ${{ steps.process-inputs.outputs.build-dir }}
 runs:
   using: composite
   steps:
     - name: Process the inputs
-      id: process_inputs
+      id: process-inputs
       shell: bash
       run: |
         SOURCE_DIR="."
@@ -64,6 +68,7 @@ runs:
         elif [ -n "${{ inputs.source-dir }}" ]; then
           BUILD_DIR="${{ inputs.source-dir }}/build"
         fi
+        echo "build-dir=$BUILD_DIR" >> $GITHUB_OUTPUT
 
         ARGS="'$SOURCE_DIR' -B '$BUILD_DIR'"
         if [ -n '${{ inputs.generator }}' ]; then
@@ -87,14 +92,14 @@ runs:
         if [ -n '${{ inputs.args }}' ]; then
           ARGS="$ARGS ${{ inputs.args }}"
         fi
-        echo "cmake_args=${ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
+        echo "cmake-args=${ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
 
         if [ '${{ inputs.run-build }}' == 'true' ] || [ '${{ inputs.run-test }}' == 'true' ]; then
           BUILD_ARGS="--build '$BUILD_DIR'"
           if [ -n '${{ inputs.build-args }}' ]; then
             BUILD_ARGS="$BUILD_ARGS ${{ inputs.build-args }}"
           fi
-          echo "cmake_build_args=${BUILD_ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
+          echo "cmake-build-args=${BUILD_ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
         fi
 
         if [ '${{ inputs.run-test }}' == 'true' ]; then
@@ -102,7 +107,7 @@ runs:
           if [ -n '${{ inputs.test-args }}' ]; then
             TEST_ARGS="$TEST_ARGS ${{ inputs.test-args }}"
           fi
-          echo "cmake_test_args=${TEST_ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
+          echo "cmake-test-args=${TEST_ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
         fi
 
     - name: Install Ninja
@@ -117,14 +122,14 @@ runs:
 
     - name: Configure the CMake project
       shell: ${{ runner.os == 'Windows' && 'pwsh' || 'bash' }}
-      run: cmake ${{ steps.process_inputs.outputs.cmake_args }}
+      run: cmake ${{ steps.process-inputs.outputs.cmake-args }}
 
     - name: Build targets
       if: inputs.run-build != 'false' || inputs.run-test != 'false'
       shell: ${{ runner.os == 'Windows' && 'pwsh' || 'bash' }}
-      run: cmake ${{ steps.process_inputs.outputs.cmake_build_args }}
+      run: cmake ${{ steps.process-inputs.outputs.cmake-build-args }}
 
     - name: Run tests
       if: inputs.run-test != 'false'
       shell: ${{ runner.os == 'Windows' && 'pwsh' || 'bash' }}
-      run: ctest ${{ steps.process_inputs.outputs.cmake_test_args }}
+      run: ctest ${{ steps.process-inputs.outputs.cmake-test-args }}