diff --git a/.github/workflows/end_to_end_tests.yml b/.github/workflows/end_to_end_tests.yml
index 8f0e679f..bd9a7f47 100644
--- a/.github/workflows/end_to_end_tests.yml
+++ b/.github/workflows/end_to_end_tests.yml
@@ -30,16 +30,16 @@ jobs:
         run: docker-compose up -d
 
       - name: "Wait for environment to build (and downloading testcafe image)"
-        run: (docker-compose -f docker-compose.testcafe.yml pull &) && docker-compose logs -f --tail=0 front | grep -m 1 "Compiled successfully"
+        run: (docker-compose -f docker-compose.testcafe.yml pull &) && docker-compose logs -f --tail=0 front | grep -q "Compiled successfully"
 
       - name: "temp debug: display logs"
         run: docker-compose logs
 
       - name: "Wait for back start"
-        run: docker-compose logs -f back | grep -m 1 "WorkAdventure HTTP API starting on port"
+        run: docker-compose logs -f back | grep -q "WorkAdventure HTTP API starting on port"
 
       - name: "Wait for pusher start"
-        run: docker-compose logs -f pusher | grep -m 1 "WorkAdventure starting on port"
+        run: docker-compose logs -f pusher | grep -q "WorkAdventure starting on port"
 
       - name: "Run tests"
         run: docker-compose -f docker-compose.testcafe.yml up --exit-code-from testcafe
diff --git a/back/src/Services/Logger.ts b/back/src/Services/Logger.ts
index e19f60d1..79f81472 100644
--- a/back/src/Services/Logger.ts
+++ b/back/src/Services/Logger.ts
@@ -4,7 +4,7 @@ const logger = winston.createLogger({
     transports: [
         new winston.transports.Console({
             format: winston.format.combine(
-                winston.format.colorize(),
+                //winston.format.colorize(),
                 winston.format.timestamp(),
                 winston.format.align(),
                 winston.format.printf((info) => `${info.timestamp} ${info.level}: ${info.message}`)