diff --git a/app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalCalendarStoreTest.kt b/app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalCalendarStoreTest.kt
index 50027ec0a..86996f7f9 100644
--- a/app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalCalendarStoreTest.kt
+++ b/app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalCalendarStoreTest.kt
@@ -21,6 +21,7 @@ import dagger.hilt.android.testing.HiltAndroidTest
 import org.junit.After
 import org.junit.Assert.assertEquals
 import org.junit.Before
+import org.junit.Ignore
 import org.junit.Rule
 import org.junit.Test
 import org.junit.rules.TestRule
@@ -61,6 +62,7 @@ class LocalCalendarStoreTest {
     }
 
 
+    @Ignore("Sometimes failing, see https://github.com/bitfireAT/davx5-ose/issues/1828")
     @Test
     fun testUpdateAccount_updatesOwnerAccount() {
         // Verify initial state
diff --git a/app/src/androidTest/kotlin/at/bitfire/davdroid/settings/migration/AccountSettingsMigration21Test.kt b/app/src/androidTest/kotlin/at/bitfire/davdroid/settings/migration/AccountSettingsMigration21Test.kt
index e732626d0..f135b5cb3 100644
--- a/app/src/androidTest/kotlin/at/bitfire/davdroid/settings/migration/AccountSettingsMigration21Test.kt
+++ b/app/src/androidTest/kotlin/at/bitfire/davdroid/settings/migration/AccountSettingsMigration21Test.kt
@@ -26,6 +26,7 @@ import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.BeforeClass
+import org.junit.Ignore
 import org.junit.Rule
 import org.junit.Test
 import java.util.logging.Logger
@@ -78,6 +79,7 @@ class AccountSettingsMigration21Test {
     }
 
 
+    @Ignore("Sometimes failing, see https://github.com/bitfireAT/davx5-ose/issues/1835")
     @SdkSuppress(minSdkVersion = 34)
     @Test
     fun testCancelsSyncAndClearsPendingState() = runBlocking {