diff --git a/packages/infrastructure/adapters/automation/MockAutomationEngineAdapter.ts b/packages/infrastructure/adapters/automation/MockAutomationEngineAdapter.ts
index c905c78d4..1c7b1a0c9 100644
--- a/packages/infrastructure/adapters/automation/MockAutomationEngineAdapter.ts
+++ b/packages/infrastructure/adapters/automation/MockAutomationEngineAdapter.ts
@@ -64,8 +64,18 @@ export class MockAutomationEngineAdapter implements IAutomationEngine {
           // Use real workflow automation with IRacingSelectorMap
           const result = await this.browserAutomation.executeStep(currentStep, config as Record<string, unknown>);
           if (!result.success) {
-            console.error(`Step ${currentStep.value} (${getStepName(currentStep.value)}) failed:`, result.error);
-            // Continue anyway for now - in production we might want to pause or retry
+            const errorMessage = `Step ${currentStep.value} (${getStepName(currentStep.value)}) failed: ${result.error}`;
+            console.error(errorMessage);
+            
+            // Stop automation and mark session as failed
+            if (this.automationInterval) {
+              clearInterval(this.automationInterval);
+              this.automationInterval = null;
+            }
+            
+            session.fail(errorMessage);
+            await this.sessionRepository.update(session);
+            return;
           }
         } else {
           // Fallback for adapters without executeStep (e.g., MockBrowserAutomationAdapter)