diff --git a/.gitlab-ci-files/job-uitests.yml b/.gitlab-ci-files/job-uitests.yml
index 94c5a3853..1bf2eecf9 100644
--- a/.gitlab-ci-files/job-uitests.yml
+++ b/.gitlab-ci-files/job-uitests.yml
@@ -19,6 +19,7 @@ job-android-uitests:
 
   stage: uitests
   tags: [ "macos-xcode13" ]
+  allow_failure: true
 
   dependencies:
     - job-android
@@ -38,7 +39,7 @@ job-android-uitests:
 
     #launch emulator
     - ${ANDROID_HOME}/platform-tools/adb start-server
-    - ${ANDROID_HOME}/emulator/emulator -avd $emulator_name -port $emulator_adb_port >> logs/emulator.log 2>&1 &
+    - ${ANDROID_HOME}/emulator/emulator -avd $emulator_name -port $emulator_adb_port -no-window -no-audio >> logs/emulator.log 2>&1 &
     - .gitlab-ci-files/wait-for-android-emulator -d emulator-$emulator_adb_port -m start
 
     - ${ANDROID_HOME}/platform-tools/adb -s emulator-$emulator_adb_port logcat -d > logs/logcats.log
diff --git a/README.md b/README.md
index 4e9908be8..770ffd48a 100644
--- a/README.md
+++ b/README.md
@@ -140,7 +140,7 @@ adb logcat -d | ndk-stack -sym ./libs-debug/arm64-v8a/
 ```
 If you don't know the CPU architecture, use the following instead:
 ```
-adb logcat -d | ndk-stack -sym ./libs-debug/`adb shell getprop ro.product.cpu.abi | tr -d '\r'` 
+adb logcat -d | ndk-stack -sym ./libs-debug/`adb shell getprop ro.product.cpu.abi | tr -d '\r'`
 ```
 Warning: This command won't print anything until you reproduce the crash!
 
@@ -173,6 +173,20 @@ Due to the full app rewrite we can't re-use previous translations, so we'll be v
 <img src="https://weblate.linphone.org/widgets/linphone/-/linphone-android/multi-auto.svg" alt="Translation status" />
 </a>
 
+# Instrumented UI tests
+
+Linphone-Android UI Tests include screenshot comparison with the git submodule [`screport`](https://gitlab.linphone.org/BC/public/screport/-/tree/main). The project must be cloned with the `--recursive` option. After updating or switching branches, never forget to checkout and update the submodules with:
+
+    git submodule update --init
+
+If you have Android Studio, simply open the project and run Instrumented UI tests.
+
+If you don't have Android Studio, you can run :
+
+    ./gradlew connectedAndroidTest                            
+
+Android Instrumented UI tests wiki : https://wiki.linphone.org/xwiki/wiki/public/view/Linphone/
+
 # CONTRIBUTIONS
 
 In order to submit a patch for inclusion in linphone's source code:
diff --git a/app/src/androidTest/java/org/linphone/methods/CallViewUITestsMethods.kt b/app/src/androidTest/java/org/linphone/methods/CallViewUITestsMethods.kt
index bc86d383f..4f853238f 100644
--- a/app/src/androidTest/java/org/linphone/methods/CallViewUITestsMethods.kt
+++ b/app/src/androidTest/java/org/linphone/methods/CallViewUITestsMethods.kt
@@ -30,6 +30,8 @@ object CallViewUITestsMethods {
     var appAccountAuthInfo: AuthInfo = UITestsCoreManager.instance.appAccountAuthInfo
     var ghostAccount: UITestsRegisteredLinphoneCore = UITestsCoreManager.instance.ghostAccounts[0]
 
+    var callTimeChecker: Job? = null
+
     fun refreshAccountInfo() {
         appAccountAuthInfo = UITestsCoreManager.instance.appAccountAuthInfo
         ghostAccount = UITestsCoreManager.instance.ghostAccounts[0]
@@ -51,10 +53,11 @@ object CallViewUITestsMethods {
         onView(withContentDescription(R.string.content_description_start_call)).perform(click())
 
         onView(withId(R.id.outgoing_call_layout)).checkWithTimeout(matches(isDisplayed()), 5.0)
-        checkCallTime(onView(withId(R.id.outgoing_call_timer)))
+        callTimeChecker = checkCallTime(onView(withId(R.id.outgoing_call_timer)))
     }
 
     fun endCall(currentView: ViewInteraction? = null) {
+        runBlocking { callTimeChecker?.join() }
         if (ghostAccount.callState == Call.State.Released) { return }
 
         ghostAccount.terminateCall()
@@ -75,7 +78,7 @@ object CallViewUITestsMethods {
                 }
                 delay(1000)
             }
-            assert(timerArray.distinct().size >= 2) { "[UITests] Call Time is not correctly incremented, less than 2 differents values are displayed in 3 seconds" }
+            assert(timerArray.distinct().size >= 2) { "[UITests] Call Time is not correctly incremented, less than 2 different values are displayed in 3 seconds" }
             assert(timerArray == timerArray.sorted()) { "[UITests] Call Time is not correctly incremented, it is not increasing" }
             assert(timerArray.first() <= firstValue + 3) { "[UITests] Call Time is not correctly initialized, it is at ${timerArray.first()}, $firstValue seconds after the start)" }
         }