Refactor existing tests to use new mixin classes

reframe_tests/tests/test_pmls.py

@@ -1,7 +1,8 @@
 import reframe as rfm
 from reframe.core.builtins import parameter
 
-from reframe_tests.tests.base_tests import GprMaxMPIRegressionTest, GprMaxRegressionTest
+from reframe_tests.tests.mixins import MpiMixin
+from reframe_tests.tests.standard_tests import GprMaxRegressionTest
 
 """Reframe regression tests for models defining geometry
 """
@@ -12,7 +13,6 @@ class TestSingleCellPml(GprMaxRegressionTest):
     tags = {"test", "serial", "geometery", "box", "pml"}
     sourcesdir = "src/pml_tests"
     model = parameter(["single_cell_pml_2d"])
-    rx_outputs = ["Hx"]
 
 
 """Test MPI Functionality
@@ -20,9 +20,7 @@ class TestSingleCellPml(GprMaxRegressionTest):
 
 
 @rfm.simple_test
-class TestSingleCellPmlMpi(GprMaxMPIRegressionTest):
+class TestSingleCellPmlMpi(MpiMixin, TestSingleCellPml):
     tags = {"test", "mpi", "geometery", "box", "pml"}
     mpi_layout = parameter([[2, 2, 1], [3, 3, 1]])
-    serial_dependency = TestSingleCellPml
-    model = serial_dependency.model
-    rx_outputs = ["Hx"]
+    test_dependency = "TestSingleCellPml"