diff --git a/docs/tests/web/project-intern-picker.md b/docs/tests/web/project-intern-picker.md
index 36f96af..3682dda 100644
--- a/docs/tests/web/project-intern-picker.md
+++ b/docs/tests/web/project-intern-picker.md
@@ -46,3 +46,7 @@ No browser loop or Impeccable detector is run on this branch; the root owner per
 After merging exact reviewed `main` `32c8a2d315d2175760c5d4792988cd0aa5ab6dd0`, `npm ci`, the 1/1 UI test, frontend build, compile, Project-scoped Javadoc/doclint, and diff check all succeeded. The first affected Java command added the updated shared `UiContractWebTest` and passed 45/45 tests with no failures, errors, or skips.
 
 The bounded post-review affected command reran `ProjectControllerTest,ProjectEntityTest,ProjectPersistenceStructureTest,ProjectServiceIntegrationTest,ProjectTaskMutationContextTest,LayerStructureTest,UiContractWebTest` and passed 47/47 with no failures, errors, or skips, including 9/9 Project service tests against PostgreSQL 18.4. The UI test remained 1/1; frontend build, compile, Project-scoped Javadoc/doclint, and `git diff --check` also succeeded.
+
+The root-owned final full suite then exposed a branch-induced MVC-slice fixture RED: 213 tests ran with 0 failures and 3 errors, all `ProjectTaskFormAccessibilityWebTest` context errors because the slice did not provide the new ProjectController AccountService dependency. A focused reproduction ran the class at 3 tests, 0 failures, 3 errors and reported the same missing AccountService constructor dependency.
+
+The smallest test-only correction supplies the controller's AccountService and Clock dependencies and the existing ProjectQueryService mock's authenticated Mentor response. The intermediate focused runs exposed each dependency in order; no production code changed. Final focused GREEN: `env JAVA_HOME=/opt/homebrew/opt/openjdk@25 PATH=/opt/homebrew/opt/openjdk@25/bin:$PATH ./mvnw '-Dtest=ProjectTaskFormAccessibilityWebTest' test` passed 3/3 with no failures, errors, or skips. The root owner retains the broader rerun.
diff --git a/src/test/java/com/lab/labtimesheet/feature/reporting/controller/ProjectTaskFormAccessibilityWebTest.java b/src/test/java/com/lab/labtimesheet/feature/reporting/controller/ProjectTaskFormAccessibilityWebTest.java
index 97d40fb..2896c11 100644
--- a/src/test/java/com/lab/labtimesheet/feature/reporting/controller/ProjectTaskFormAccessibilityWebTest.java
+++ b/src/test/java/com/lab/labtimesheet/feature/reporting/controller/ProjectTaskFormAccessibilityWebTest.java
@@ -8,14 +8,20 @@ import static org.springframework.test.web.servlet.request.MockMvcRequestBuilder
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
+import com.lab.labtimesheet.feature.account.service.AccountService;
 import com.lab.labtimesheet.feature.integration.service.SmtpConfigurationService;
 import com.lab.labtimesheet.feature.project.controller.ProjectController;
+import com.lab.labtimesheet.feature.project.model.dto.ProjectActorView;
 import com.lab.labtimesheet.feature.project.service.ProjectQueryService;
 import com.lab.labtimesheet.feature.project.service.ProjectService;
 import com.lab.labtimesheet.feature.task.controller.TaskController;
 import com.lab.labtimesheet.feature.task.model.dto.TaskAssigneeChoice;
 import com.lab.labtimesheet.feature.task.service.TaskService;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
 import java.util.List;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.webmvc.test.autoconfigure.WebMvcTest;
@@ -34,12 +40,26 @@ class ProjectTaskFormAccessibilityWebTest {
     @MockitoBean
     private ProjectService projects;
 
+    @MockitoBean
+    private AccountService accounts;
+
+    @MockitoBean
+    private Clock clock;
+
     @MockitoBean
     private TaskService tasks;
 
     @MockitoBean
     private SmtpConfigurationService smtpConfiguration;
 
+    @BeforeEach
+    void mentorActor() {
+        given(projectQueries.authenticatedActor("mentor@example.test"))
+                .willReturn(new ProjectActorView(10L, "MENTOR"));
+        given(clock.instant()).willReturn(Instant.parse("2026-08-15T01:00:00Z"));
+        given(clock.getZone()).willReturn(ZoneId.of("Asia/Ho_Chi_Minh"));
+    }
+
     @Test
     void projectFieldErrorsHaveStableIdsAndInputAssociations() throws Exception {
         mvc.perform(post("/projects")