diff --git a/src/shared/model-requirements.test.ts b/src/shared/model-requirements.test.ts
index 5f3186827..643de19d0 100644
--- a/src/shared/model-requirements.test.ts
+++ b/src/shared/model-requirements.test.ts
@@ -265,8 +265,8 @@ describe("AGENT_MODEL_REQUIREMENTS", () => {
     expect(hephaestus.requiresModel).toBeUndefined()
   })
 
-  test("all 12 builtin agents have valid fallbackChain arrays", () => {
-    // #given - list of 12 agent names
+  test("all 13 builtin agents have valid fallbackChain arrays", () => {
+    // #given - list of 13 agent names
     const expectedAgents = [
       "sisyphus",
       "hephaestus",
@@ -280,6 +280,7 @@ describe("AGENT_MODEL_REQUIREMENTS", () => {
       "atlas",
       "sisyphus-junior",
       "athena",
+      "athena-junior",
       "council-member",
     ]
 
@@ -287,7 +288,7 @@ describe("AGENT_MODEL_REQUIREMENTS", () => {
     const definedAgents = Object.keys(AGENT_MODEL_REQUIREMENTS)
 
     // #then - all agents present with valid fallbackChain
-    expect(definedAgents).toHaveLength(12)
+    expect(definedAgents).toHaveLength(13)
     for (const agent of expectedAgents) {
       const requirement = AGENT_MODEL_REQUIREMENTS[agent]
       expect(requirement).toBeDefined()