diff --git a/vector/src/test/java/im/vector/app/features/analytics/impl/DefaultVectorAnalyticsTest.kt b/vector/src/test/java/im/vector/app/features/analytics/impl/DefaultVectorAnalyticsTest.kt
index 226a2d8ecf..ea8beaa86c 100644
--- a/vector/src/test/java/im/vector/app/features/analytics/impl/DefaultVectorAnalyticsTest.kt
+++ b/vector/src/test/java/im/vector/app/features/analytics/impl/DefaultVectorAnalyticsTest.kt
@@ -16,9 +16,6 @@
 
 package im.vector.app.features.analytics.impl
 
-import com.posthog.android.Properties
-import im.vector.app.features.analytics.itf.VectorAnalyticsEvent
-import im.vector.app.features.analytics.itf.VectorAnalyticsScreen
 import im.vector.app.test.fakes.FakeAnalyticsStore
 import im.vector.app.test.fakes.FakeLateInitUserPropertiesFactory
 import im.vector.app.test.fakes.FakePostHog
@@ -128,7 +125,7 @@ class DefaultVectorAnalyticsTest {
 
         defaultVectorAnalytics.screen(A_SCREEN_EVENT)
 
-        fakePostHog.verifyScreenTracked(A_SCREEN_EVENT.getName(), A_SCREEN_EVENT.toPostHogProperties())
+        fakePostHog.verifyScreenTracked(A_SCREEN_EVENT.getName(), A_SCREEN_EVENT.getProperties())
     }
 
     @Test
@@ -146,7 +143,7 @@ class DefaultVectorAnalyticsTest {
 
         defaultVectorAnalytics.capture(AN_EVENT)
 
-        fakePostHog.verifyEventTracked(AN_EVENT.getName(), AN_EVENT.toPostHogProperties())
+        fakePostHog.verifyEventTracked(AN_EVENT.getName(), AN_EVENT.getProperties().clearNulls())
     }
 
     @Test
@@ -176,16 +173,16 @@ class DefaultVectorAnalyticsTest {
 
         fakeSentryAnalytics.verifyNoErrorTracking()
     }
-}
 
-private fun VectorAnalyticsScreen.toPostHogProperties(): Properties? {
-    return getProperties()?.let { properties ->
-        Properties().also { it.putAll(properties) }
-    }
-}
-
-private fun VectorAnalyticsEvent.toPostHogProperties(): Properties? {
-    return getProperties()?.let { properties ->
-        Properties().also { it.putAll(properties) }
+    private fun Map<String, Any?>?.clearNulls(): Map<String, Any>? {
+        if (this == null) return null
+
+        val nonNulls = HashMap<String, Any>()
+        this.forEach { (key, value) ->
+            if (value != null) {
+                nonNulls[key] = value
+            }
+        }
+        return nonNulls
     }
 }
diff --git a/vector/src/test/java/im/vector/app/test/fakes/FakePostHog.kt b/vector/src/test/java/im/vector/app/test/fakes/FakePostHog.kt
index e14f809e66..ccc326ba14 100644
--- a/vector/src/test/java/im/vector/app/test/fakes/FakePostHog.kt
+++ b/vector/src/test/java/im/vector/app/test/fakes/FakePostHog.kt
@@ -17,8 +17,7 @@
 package im.vector.app.test.fakes
 
 import android.os.Looper
-import com.posthog.android.PostHog
-import com.posthog.android.Properties
+import com.posthog.PostHogInterface
 import im.vector.app.features.analytics.plan.UserProperties
 import io.mockk.every
 import io.mockk.mockk
@@ -36,16 +35,19 @@ class FakePostHog {
         every { Looper.getMainLooper() } returns looper
     }
 
-    val instance = mockk<PostHog>(relaxed = true)
+    val instance = mockk<PostHogInterface>(relaxed = true)
 
     fun verifyOptOutStatus(optedOut: Boolean) {
-        verify { instance.optOut(optedOut) }
+        if (optedOut) {
+            verify { instance.optOut() }
+        } else {
+            verify { instance.optIn() }
+        }
     }
 
     fun verifyIdentifies(analyticsId: String, userProperties: UserProperties?) {
         verify {
             val postHogProperties = userProperties?.getProperties()
-                    ?.let { rawProperties -> Properties().also { it.putAll(rawProperties) } }
                     ?.takeIf { it.isNotEmpty() }
             instance.identify(analyticsId, postHogProperties, null)
         }
@@ -55,7 +57,7 @@ class FakePostHog {
         verify { instance.reset() }
     }
 
-    fun verifyScreenTracked(name: String, properties: Properties?) {
+    fun verifyScreenTracked(name: String, properties: Map<String, Any>?) {
         verify { instance.screen(name, properties) }
     }
 
@@ -63,12 +65,11 @@ class FakePostHog {
         verify(exactly = 0) {
             instance.screen(any())
             instance.screen(any(), any())
-            instance.screen(any(), any(), any())
         }
     }
 
-    fun verifyEventTracked(name: String, properties: Properties?) {
-        verify { instance.capture(name, properties) }
+    fun verifyEventTracked(name: String, properties: Map<String, Any>?) {
+        verify { instance.capture(name, null, properties) }
     }
 
     fun verifyNoEventTracking() {