diff --git a/tests/src/python/test_qgsserver_wms_getlegendgraphic.py b/tests/src/python/test_qgsserver_wms_getlegendgraphic.py
index 6a966caf943..06feb6cd0bb 100644
--- a/tests/src/python/test_qgsserver_wms_getlegendgraphic.py
+++ b/tests/src/python/test_qgsserver_wms_getlegendgraphic.py
@@ -1254,7 +1254,7 @@ class TestQgsServerWMSGetLegendGraphic(TestQgsServerWMSTestBase):
         self.wms_request_compare("GetLegendGraphic",
                                  "&LAYERS=testlayer%20%C3%A8%C3%A9,testlayer3"
                                  "&FORMAT=application/json",
-                                 ["wms_getlegendgraphic_json_multiple_layers", "wms_getlegendgraphic_json_multiple_layers2"])
+                                 ["wms_getlegendgraphic_json_multiple_layers", "wms_getlegendgraphic_json_multiple_layers2", "wms_getlegendgraphic_json_multiple_layers3"])
 
     def test_wms_GetLegendGraphic_JSON_multiple_symbol(self):
         self.wms_request_compare("GetLegendGraphic",
diff --git a/tests/testdata/qgis_server/wms_getlegendgraphic_json_multiple_layers3.txt b/tests/testdata/qgis_server/wms_getlegendgraphic_json_multiple_layers3.txt
new file mode 100644
index 00000000000..63b184ba506
--- /dev/null
+++ b/tests/testdata/qgis_server/wms_getlegendgraphic_json_multiple_layers3.txt
@@ -0,0 +1,4 @@
+*****
+Content-Type: application/json
+
+{"nodes": [{"icon": "iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAUklEQVQ4jWNgGAV0A4z4JJWVlf8j8+/evYtTPQs+Q474qaKI2Wxi+I/LMKyC2AxBGHYbq8uYcLmIVDBEDLp79y6jzabbJBlEUvQzEEgCo4BOAAD7DRqVh2f6CwAAAABJRU5ErkJggg==", "title": "testlayer3", "type": "layer"}, {"icon": "iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAP0lEQVQ4jWNgGAV0A4wE5P8Tqx6fQf/TljijCMyK2YtTDy6DMAwhZBgTHheRBIaOQYzQsCAakBr9xOgZBbQGAKb+C8EdAkkoAAAAAElFTkSuQmCC", "title": "A test vector layer", "type": "layer"}], "title": ""}