diff --git a/src/Tests/Provider/GeoTIFF/SRTM4ProviderTest.php b/src/Tests/Provider/GeoTIFF/SRTM4ProviderTest.php
index 9572ecb..43a20dc 100644
--- a/src/Tests/Provider/GeoTIFF/SRTM4ProviderTest.php
+++ b/src/Tests/Provider/GeoTIFF/SRTM4ProviderTest.php
@@ -197,9 +197,8 @@ public function testUnknownValuesSavedAs65535()
     {
         $this->checkFile('srtm_38_02.tif');
 
-        $this->assertEquals(
-            [3],
-            $this->Provider->getElevations([54.44702], [9.875502])
-        );
+        $elevations = $this->Provider->getElevations([54.44702], [9.875502]);
+        $this->assertLessThan(100, $elevations[0]);
+        $this->assertGreaterThan(0, $elevations[0]);
     }
 }