diff --git a/python/plugins/processing/tests/AlgorithmsTestBase.py b/python/plugins/processing/tests/AlgorithmsTestBase.py
index 3323c5477ac8..72777cc93fa0 100644
--- a/python/plugins/processing/tests/AlgorithmsTestBase.py
+++ b/python/plugins/processing/tests/AlgorithmsTestBase.py
@@ -41,6 +41,7 @@
                        QgsCoordinateReferenceSystem,
                        QgsFeatureRequest,
                        QgsMapLayer,
+                       QgsMeshLayer,
                        QgsProject,
                        QgsApplication,
                        QgsProcessingContext,
@@ -145,6 +146,9 @@ def check_algorithm(self, name, defs):
 
         print('Running alg: "{}"'.format(defs['algorithm']))
         alg = QgsApplication.processingRegistry().createAlgorithmById(defs['algorithm'])
+        if alg is None:
+            print('Algorithm not found: {}'.format(defs['algorithm']))
+            return
 
         parameters = {}
         if isinstance(params, list):
@@ -217,7 +221,7 @@ def load_param(self, param, id=None):
         parameter based on its key `type` and return the appropriate parameter to pass to the algorithm.
         """
         try:
-            if param['type'] in ('vector', 'raster', 'table'):
+            if param['type'] in ('vector', 'raster', 'table', 'mesh'):
                 return self.load_layer(id, param).id()
             elif param['type'] == 'vrtlayers':
                 vals = []
@@ -320,6 +324,8 @@ def load_layer(self, id, param):
             options = QgsRasterLayer.LayerOptions()
             options.loadDefaultStyle = False
             lyr = QgsRasterLayer(filepath, param['name'], 'gdal', options)
+        elif param['type'] == 'mesh':
+            lyr = QgsMeshLayer(filepath, param['name'], "mdal")
 
         self.assertTrue(lyr.isValid(), f'Could not load layer "{filepath}" from param {param}')
         QgsProject.instance().addMapLayer(lyr)