diff --git a/builtins/en/pieces/default-test-first-mini.yaml b/builtins/en/pieces/default-test-first-mini.yaml
index aba8e2f..d858795 100644
--- a/builtins/en/pieces/default-test-first-mini.yaml
+++ b/builtins/en/pieces/default-test-first-mini.yaml
@@ -53,6 +53,8 @@ movements:
     rules:
       - condition: Tests written successfully
         next: implement
+      - condition: Cannot proceed because the test target is not implemented yet, so skip test writing
+        next: implement
       - condition: Cannot proceed with test creation
         next: ABORT
       - condition: User input required because there are items to confirm with the user
diff --git a/builtins/en/pieces/default.yaml b/builtins/en/pieces/default.yaml
index e3be2dd..abddca8 100644
--- a/builtins/en/pieces/default.yaml
+++ b/builtins/en/pieces/default.yaml
@@ -84,6 +84,8 @@ movements:
     rules:
       - condition: Tests written successfully
         next: implement
+      - condition: Cannot proceed because the test target is not implemented yet, so skip test writing
+        next: implement
       - condition: Cannot proceed with test writing
         next: ABORT
       - condition: User input needed for clarification
diff --git a/builtins/ja/pieces/default-test-first-mini.yaml b/builtins/ja/pieces/default-test-first-mini.yaml
index 66cf80f..14c6db1 100644
--- a/builtins/ja/pieces/default-test-first-mini.yaml
+++ b/builtins/ja/pieces/default-test-first-mini.yaml
@@ -53,6 +53,8 @@ movements:
     rules:
       - condition: テスト作成が完了した
         next: implement
+      - condition: テスト対象が未実装のためテスト作成をスキップする
+        next: implement
       - condition: テスト作成を進行できない
         next: ABORT
       - condition: ユーザーへの確認事項があるためユーザー入力が必要
diff --git a/builtins/ja/pieces/default.yaml b/builtins/ja/pieces/default.yaml
index 99ceb34..9a5ac19 100644
--- a/builtins/ja/pieces/default.yaml
+++ b/builtins/ja/pieces/default.yaml
@@ -84,6 +84,8 @@ movements:
     rules:
       - condition: テスト作成が完了した
         next: implement
+      - condition: テスト対象が未実装のためテスト作成をスキップする
+        next: implement
       - condition: テスト作成を進行できない
         next: ABORT
       - condition: ユーザーへの確認事項があるためユーザー入力が必要
diff --git a/src/__tests__/it-piece-patterns.test.ts b/src/__tests__/it-piece-patterns.test.ts
index dc048e9..e7817e0 100644
--- a/src/__tests__/it-piece-patterns.test.ts
+++ b/src/__tests__/it-piece-patterns.test.ts
@@ -182,6 +182,26 @@ describe('Piece Patterns IT: default piece (parallel reviewers)', () => {
     expect(state.status).toBe('completed');
   });
 
+  it('should continue to implement when tests cannot be written because target is not implemented', async () => {
+    const config = loadPiece('default', testDir);
+
+    setMockScenario([
+      { persona: 'planner', status: 'done', content: 'Requirements are clear and implementable' },
+      { persona: 'coder', status: 'done', content: 'Cannot proceed because the test target is not implemented yet, so skip test writing' },
+      { persona: 'coder', status: 'done', content: 'Implementation complete' },
+      { persona: 'ai-antipattern-reviewer', status: 'done', content: 'No AI-specific issues' },
+      { persona: 'architecture-reviewer', status: 'done', content: 'approved' },
+      { persona: 'qa-reviewer', status: 'done', content: 'approved' },
+      { persona: 'testing-reviewer', status: 'done', content: 'approved' },
+      { persona: 'supervisor', status: 'done', content: 'All checks passed' },
+    ]);
+
+    const engine = createEngine(config!, testDir, 'Test task');
+    const state = await engine.run();
+
+    expect(state.status).toBe('completed');
+  });
+
   it('should route to fix when any("needs_fix") in parallel review step', async () => {
     const config = loadPiece('default', testDir);
 
@@ -211,6 +231,38 @@ describe('Piece Patterns IT: default piece (parallel reviewers)', () => {
   });
 });
 
+describe('Piece Patterns IT: default-test-first-mini piece', () => {
+  let testDir: string;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    testDir = createTestDir();
+  });
+
+  afterEach(() => {
+    resetScenario();
+    rmSync(testDir, { recursive: true, force: true });
+  });
+
+  it('should continue to implement when tests cannot be written because target is not implemented', async () => {
+    const config = loadPiece('default-test-first-mini', testDir);
+    expect(config).not.toBeNull();
+
+    setMockScenario([
+      { persona: 'planner', status: 'done', content: 'Requirements are clear and implementation is possible' },
+      { persona: 'coder', status: 'done', content: 'Cannot proceed because the test target is not implemented yet, so skip test writing' },
+      { persona: 'coder', status: 'done', content: 'Implementation complete' },
+      { persona: 'ai-antipattern-reviewer', status: 'done', content: 'No AI-specific issues' },
+      { persona: 'supervisor', status: 'done', content: 'All checks passed' },
+    ]);
+
+    const engine = createEngine(config!, testDir, 'Test task');
+    const state = await engine.run();
+
+    expect(state.status).toBe('completed');
+  });
+});
+
 describe('Piece Patterns IT: research piece', () => {
   let testDir: string;