diff --git a/Tests/TestCesium3DTileset.cs b/Tests/TestCesium3DTileset.cs
index 639d4b70..fa22c4f8 100644
--- a/Tests/TestCesium3DTileset.cs
+++ b/Tests/TestCesium3DTileset.cs
@@ -15,6 +15,7 @@ public IEnumerator SampleHeightMostDetailedWorksWithAnEmptyArrayOfPositions()
         GameObject go = new GameObject();
         go.name = "Cesium World Terrain";
         Cesium3DTileset tileset = go.AddComponent<Cesium3DTileset>();
+        tileset.ionAccessToken = Environment.GetEnvironmentVariable("CESIUM_ION_TOKEN_FOR_TESTS") ?? "";
         tileset.ionAssetID = 1;
 
         // TODO: remove this
@@ -43,6 +44,7 @@ public IEnumerator SampleHeightMostDetailedWorksWithASinglePosition()
         GameObject go = new GameObject();
         go.name = "Cesium World Terrain";
         Cesium3DTileset tileset = go.AddComponent<Cesium3DTileset>();
+        tileset.ionAccessToken = Environment.GetEnvironmentVariable("CESIUM_ION_TOKEN_FOR_TESTS") ?? "";
         tileset.ionAssetID = 1;
 
         // TODO: remove this
@@ -70,4 +72,82 @@ public IEnumerator SampleHeightMostDetailedWorksWithASinglePosition()
         // Returned height should be different from the original height (1.0) by at least one meter.
         Assert.IsTrue(math.abs(result.longitudeLatitudeHeightPositions[0].z - 1.0) > 1.0);
     }
+
+    [UnityTest]
+    public IEnumerator SampleHeightMostDetailedWorksWithMultiplePositions()
+    {
+        GameObject go = new GameObject();
+        go.name = "Cesium World Terrain";
+        Cesium3DTileset tileset = go.AddComponent<Cesium3DTileset>();
+        tileset.ionAccessToken = Environment.GetEnvironmentVariable("CESIUM_ION_TOKEN_FOR_TESTS") ?? "";
+        tileset.ionAssetID = 1;
+
+        // TODO: remove this
+        yield return null;
+
+        Task<SampleHeightResult> task = tileset.SampleHeightMostDetailed(
+            new double3(-105.1, 40.1, 1.0),
+            new double3(105.1, -40.1, 1.0));
+
+        while (!task.IsCompleted)
+        {
+            yield return null;
+        }
+
+        SampleHeightResult result = task.Result;
+        Assert.IsNotNull(result);
+        Assert.IsNotNull(result.longitudeLatitudeHeightPositions);
+        Assert.IsNotNull(result.heightSampled);
+        Assert.IsNotNull(result.warnings);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions.Length, 2);
+        Assert.AreEqual(result.heightSampled.Length, 2);
+        Assert.AreEqual(result.warnings.Length, 0);
+
+        Assert.AreEqual(result.heightSampled[0], true);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[0].x, -105.1, 1e-12);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[0].y, 40.1, 1e-12);
+        // Returned height should be different from the original height (1.0) by at least one meter.
+        Assert.IsTrue(math.abs(result.longitudeLatitudeHeightPositions[0].z - 1.0) > 1.0);
+
+        Assert.AreEqual(result.heightSampled[1], true);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[1].x, 105.1, 1e-12);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[1].y, -40.1, 1e-12);
+        // Returned height should be different from the original height (1.0) by at least one meter.
+        Assert.IsTrue(math.abs(result.longitudeLatitudeHeightPositions[1].z - 1.0) > 1.0);
+    }
+
+    [UnityTest]
+    public IEnumerator SampleHeightMostDetailedIndicatesNotSampledForPositionOutsideTileset()
+    {
+        GameObject go = new GameObject();
+        go.name = "Melbourne Photogrammetry";
+        Cesium3DTileset tileset = go.AddComponent<Cesium3DTileset>();
+        tileset.ionAccessToken = Environment.GetEnvironmentVariable("CESIUM_ION_TOKEN_FOR_TESTS") ?? "";
+        tileset.ionAssetID = 69380;
+
+        // TODO: remove this
+        yield return null;
+
+        // Somewhere in Sydney, not Melbourne
+        Task<SampleHeightResult> task = tileset.SampleHeightMostDetailed(new double3(151.20972, -33.87100, 1.0));
+
+        while (!task.IsCompleted)
+        {
+            yield return null;
+        }
+
+        SampleHeightResult result = task.Result;
+        Assert.IsNotNull(result);
+        Assert.IsNotNull(result.longitudeLatitudeHeightPositions);
+        Assert.IsNotNull(result.heightSampled);
+        Assert.IsNotNull(result.warnings);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions.Length, 1);
+        Assert.AreEqual(result.heightSampled.Length, 1);
+        Assert.AreEqual(result.warnings.Length, 0);
+
+        Assert.AreEqual(result.heightSampled[0], false);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[0].x, 151.20972, 1e-12);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[0].y, -33.87100, 1e-12);
+        Assert.AreEqual(result.longitudeLatitudeHeightPositions[0].z, 1.0, 1e-12);
+    }
 }
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