diff --git a/parallelTests.cmake b/parallelTests.cmake
index d08be1510e2..f4e3b7c664c 100644
--- a/parallelTests.cmake
+++ b/parallelTests.cmake
@@ -946,6 +946,23 @@ add_test_compare_parallel_simulation(
     --linear-solver-reduction=1e-7
 )
 
+add_test_compare_parallel_simulation(
+  CASENAME
+    editnnc_multregt
+  FILENAME
+    EDITNNC_AND_MULTREGT
+  SIMULATOR
+    flow
+  DEV_SIMULATOR
+    flow_blackoil
+  ABS_TOL
+    ${abs_tol_parallel}
+  REL_TOL
+    ${rel_tol_parallel}
+  DIR
+    editnnc
+)
+
 opm_set_test_driver(${PROJECT_SOURCE_DIR}/tests/run-comparison.sh "")
 
 add_test_compareSeparateECLFiles(
diff --git a/regressionTests.cmake b/regressionTests.cmake
index ddfb0573a95..d9edcbeffa7 100644
--- a/regressionTests.cmake
+++ b/regressionTests.cmake
@@ -2008,6 +2008,25 @@ add_test_compareECLFiles(
     editnnc
 )
 
+add_test_compareECLFiles(
+  CASENAME
+    editnnc_multregt
+  FILENAME
+    EDITNNC_AND_MULTREGT
+  SIMULATOR
+    flow
+  DEV_SIMULATOR
+    flow_blackoil
+  ABS_TOL
+    ${abs_tol}
+  REL_TOL
+    ${rel_tol}
+  DIR
+    editnnc
+  TEST_ARGS
+    --solver-max-time-step-in-days=0.1
+)
+
 add_test_compareECLFiles(
   CASENAME
     nnc_overlapping_editnnc