diff --git a/ground/src/test/java/com/google/android/ground/MainActivityTest.kt b/ground/src/test/java/com/google/android/ground/MainActivityTest.kt
index d751ec61d8..9a64cca75c 100644
--- a/ground/src/test/java/com/google/android/ground/MainActivityTest.kt
+++ b/ground/src/test/java/com/google/android/ground/MainActivityTest.kt
@@ -17,6 +17,7 @@ package com.google.android.ground
 
 import com.google.android.ground.system.auth.SignInState
 import com.google.common.truth.Truth.assertThat
+import com.google.firebase.firestore.FirebaseFirestoreException
 import com.sharedtest.system.auth.FakeAuthenticationManager
 import dagger.hilt.android.testing.HiltAndroidTest
 import javax.inject.Inject
@@ -67,4 +68,22 @@ class MainActivityTest : BaseHiltTest() {
       assertThat(ShadowProgressDialog.getLatestDialog().isShowing).isFalse()
     }
   }
+
+  @Test
+  fun signInErrorDialog_isDisplayed() = runWithTestDispatcher {
+    Robolectric.buildActivity(MainActivity::class.java).use { controller ->
+      controller.setup() // Moves Activity to RESUMED state
+      activity = controller.get()
+
+      fakeAuthenticationManager.setState(
+        SignInState.Error(
+          error =
+            FirebaseFirestoreException("error", FirebaseFirestoreException.Code.PERMISSION_DENIED)
+        )
+      )
+      advanceUntilIdle()
+
+      assertThat(ShadowProgressDialog.getLatestDialog().isShowing).isTrue()
+    }
+  }
 }
diff --git a/ground/src/test/java/com/google/android/ground/PermissionDeniedDialogTest.kt b/ground/src/test/java/com/google/android/ground/PermissionDeniedDialogTest.kt
new file mode 100644
index 0000000000..e05e084a93
--- /dev/null
+++ b/ground/src/test/java/com/google/android/ground/PermissionDeniedDialogTest.kt
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.ground
+
+import androidx.activity.ComponentActivity
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onNodeWithText
+import androidx.compose.ui.test.performClick
+import dagger.hilt.android.testing.HiltAndroidTest
+import kotlin.test.Test
+import org.junit.Rule
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+
+@HiltAndroidTest
+@RunWith(RobolectricTestRunner::class)
+class PermissionDeniedDialogTest : BaseHiltTest() {
+
+  @get:Rule override val composeTestRule = createAndroidComposeRule<ComponentActivity>()
+
+  @Test
+  fun permissionDeniedDialog_DisplaysCorrectTitle() {
+    composeTestRule.setContent {
+      PermissionDeniedDialog(signupLink = "http://example.com", onSignOut = {}, onCloseApp = {})
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.permission_denied))
+      .assertIsDisplayed()
+  }
+
+  @Test
+  fun permissionDeniedDialog_DisplaysSignOutButton() {
+    composeTestRule.setContent {
+      PermissionDeniedDialog(signupLink = "http://example.com", onSignOut = {}, onCloseApp = {})
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.sign_out))
+      .assertIsDisplayed()
+  }
+
+  @Test
+  fun permissionDeniedDialog_DisplaysCloseAppButton() {
+    composeTestRule.setContent {
+      PermissionDeniedDialog(signupLink = "http://example.com", onSignOut = {}, onCloseApp = {})
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.close_app))
+      .assertIsDisplayed()
+  }
+
+  @Test
+  fun permissionDeniedDialog_ClickSignOutButton_CallsOnSignOut() {
+    var signOutCalled = false
+
+    composeTestRule.setContent {
+      PermissionDeniedDialog(
+        signupLink = "http://example.com",
+        onSignOut = { signOutCalled = true },
+        onCloseApp = {},
+      )
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.sign_out))
+      .performClick()
+
+    assert(signOutCalled)
+  }
+
+  @Test
+  fun permissionDeniedDialog_ClickCloseAppButton_CallsOnCloseApp() {
+    var closeAppCalled = false
+
+    composeTestRule.setContent {
+      PermissionDeniedDialog(
+        signupLink = "http://example.com",
+        onSignOut = {},
+        onCloseApp = { closeAppCalled = true },
+      )
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.close_app))
+      .performClick()
+
+    assert(closeAppCalled)
+  }
+
+  @Test
+  fun permissionDeniedDialog_DisplaysSignupLink_WhenLinkIsProvided() {
+    composeTestRule.setContent {
+      PermissionDeniedDialog(signupLink = "http://example.com", onSignOut = {}, onCloseApp = {})
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.signup_request_access))
+      .assertIsDisplayed()
+  }
+
+  @Test
+  fun permissionDeniedDialog_DoesNotDisplaySignupLink_WhenLinkIsEmpty() {
+    composeTestRule.setContent {
+      PermissionDeniedDialog(signupLink = "", onSignOut = {}, onCloseApp = {})
+    }
+
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.signup_request_access))
+      .assertDoesNotExist()
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.admin_request_access))
+      .assertIsDisplayed()
+  }
+
+  @Test
+  fun signOutWarning_isDisplayed() {
+    composeTestRule.setContent {
+      PermissionDeniedDialog(signupLink = "", onSignOut = {}, onCloseApp = {})
+    }
+    composeTestRule
+      .onNodeWithText(composeTestRule.activity.getString(R.string.signout_warning))
+      .assertIsDisplayed()
+  }
+}