diff --git a/api/src/certification/flash-certification/application/scenario-simulator-controller.js b/api/src/certification/flash-certification/application/scenario-simulator-controller.js
index 4ffdfc4879f..a95ec5383dc 100644
--- a/api/src/certification/flash-certification/application/scenario-simulator-controller.js
+++ b/api/src/certification/flash-certification/application/scenario-simulator-controller.js
@@ -64,6 +64,7 @@ async function simulateFlashAssessmentScenario(
           errorRate: answer.errorRate,
           answerStatus: answer.answerStatus,
           capacity: answer.capacity,
+          numberOfAvailableChallenges: answer.numberOfAvailableChallenges,
         })),
       }) + '\n';
     }
diff --git a/api/src/certification/flash-certification/domain/models/AssessmentSimulatorSingleMeasureStrategy.js b/api/src/certification/flash-certification/domain/models/AssessmentSimulatorSingleMeasureStrategy.js
index a68d6ad3ba0..93564f39400 100644
--- a/api/src/certification/flash-certification/domain/models/AssessmentSimulatorSingleMeasureStrategy.js
+++ b/api/src/certification/flash-certification/domain/models/AssessmentSimulatorSingleMeasureStrategy.js
@@ -60,6 +60,7 @@ export class AssessmentSimulatorSingleMeasureStrategy {
           capacity,
           reward,
           answerStatus,
+          numberOfAvailableChallenges: possibleChallenges.length,
         },
       ],
       challengeAnswers: [newAnswer],
diff --git a/api/tests/acceptance/application/scenario-simulator/scenario-simulator-controller_test.js b/api/tests/acceptance/application/scenario-simulator/scenario-simulator-controller_test.js
index 9b1bb68bb9f..a462f7073c9 100644
--- a/api/tests/acceptance/application/scenario-simulator/scenario-simulator-controller_test.js
+++ b/api/tests/acceptance/application/scenario-simulator/scenario-simulator-controller_test.js
@@ -165,6 +165,7 @@ describe('Acceptance | Controller | scenario-simulator-controller', function ()
       expect(parsedResponse[0].simulationReport[0].reward).to.exist;
       expect(parsedResponse[0].simulationReport[0].errorRate).to.exist;
       expect(parsedResponse[0].simulationReport[0].answerStatus).to.exist;
+      expect(parsedResponse[0].simulationReport[0].numberOfAvailableChallenges).to.exist;
     });
 
     describe('when there is no connected user', function () {
diff --git a/api/tests/certification/flash-certification/integration/application/scenario-simulator-controller_test.js b/api/tests/certification/flash-certification/integration/application/scenario-simulator-controller_test.js
index cae2c96d631..8c759e91d2e 100644
--- a/api/tests/certification/flash-certification/integration/application/scenario-simulator-controller_test.js
+++ b/api/tests/certification/flash-certification/integration/application/scenario-simulator-controller_test.js
@@ -21,19 +21,6 @@ describe('Integration | Application | scenario-simulator-controller', function (
     sinon.stub(pickAnswerStatusService, 'pickAnswerStatusForCapacity');
     sinon.stub(pickChallengeService, 'chooseNextChallenge');
 
-    challenge1 = domainBuilder.buildChallenge({ id: 'chall1', successProbabilityThreshold: 0.65 });
-    reward1 = 0.2;
-    errorRate1 = 0.3;
-    capacity1 = 0.4;
-    simulationResults = [
-      {
-        challenge: challenge1,
-        reward: reward1,
-        errorRate: errorRate1,
-        capacity: capacity1,
-      },
-    ];
-
     httpTestServer = new HttpTestServer();
     await httpTestServer.register(moduleUnderTest);
   });
@@ -52,9 +39,11 @@ describe('Integration | Application | scenario-simulator-controller', function (
             errorRate: errorRate1,
             capacity: capacity1,
             answerStatus: 'ok',
+            numberOfAvailableChallenges: 1,
           },
         ];
       });
+
       context('When configuring the challenge pick probability', function () {
         it('should call simulateFlashAssessmentScenario usecase with correct arguments', async function () {
           // given
@@ -108,6 +97,7 @@ describe('Integration | Application | scenario-simulator-controller', function (
                   reward: reward1,
                   difficulty: challenge1.difficulty,
                   discriminant: challenge1.discriminant,
+                  numberOfAvailableChallenges: 1,
                 },
               ],
             },
@@ -164,6 +154,7 @@ describe('Integration | Application | scenario-simulator-controller', function (
                     reward: reward1,
                     difficulty: challenge1.difficulty,
                     discriminant: challenge1.discriminant,
+                    numberOfAvailableChallenges: 1,
                   },
                 ],
               },
@@ -221,6 +212,7 @@ describe('Integration | Application | scenario-simulator-controller', function (
                     reward: reward1,
                     difficulty: challenge1.difficulty,
                     discriminant: challenge1.discriminant,
+                    numberOfAvailableChallenges: 1,
                   },
                 ],
               },
diff --git a/api/tests/certification/flash-certification/unit/domain/models/AssessmentSimulatorSingleMeasureStrategy_test.js b/api/tests/certification/flash-certification/unit/domain/models/AssessmentSimulatorSingleMeasureStrategy_test.js
index 2fc78a78519..ebabd23e190 100644
--- a/api/tests/certification/flash-certification/unit/domain/models/AssessmentSimulatorSingleMeasureStrategy_test.js
+++ b/api/tests/certification/flash-certification/unit/domain/models/AssessmentSimulatorSingleMeasureStrategy_test.js
@@ -111,6 +111,7 @@ describe('Unit | Domain | Models | AssessmentSimulatorSingleMeasureStrategy', fu
                 errorRate: expectedErrorRate,
                 reward: expectedReward,
                 answerStatus: answerForSimulator,
+                numberOfAvailableChallenges: 2,
               },
             ],
             challengeAnswers: [
@@ -248,6 +249,7 @@ describe('Unit | Domain | Models | AssessmentSimulatorSingleMeasureStrategy', fu
                 errorRate: expectedErrorRate,
                 reward: expectedReward,
                 answerStatus: answerForSimulator,
+                numberOfAvailableChallenges: 2,
               },
             ],
             challengeAnswers: [