diff --git a/compareECLFiles.cmake b/compareECLFiles.cmake
index 3f46fa1c3..4eda58922 100755
--- a/compareECLFiles.cmake
+++ b/compareECLFiles.cmake
@@ -478,6 +478,13 @@ add_test_compareECLFiles(CASENAME udq_undefined
                          REL_TOL ${rel_tol}
                          DIR udq_actionx)
 
+add_test_compareECLFiles(CASENAME udq_in_actionx
+                         FILENAME UDQ_M3
+                         SIMULATOR flow
+                         ABS_TOL ${abs_tol}
+                         REL_TOL ${rel_tol}
+                         DIR udq_actionx)
+
 if (opm-common_EMBEDDED_PYTHON)
   add_test_compareECLFiles(CASENAME udq_pyaction
                            FILENAME PYACTION_WCONPROD
diff --git a/tests/update_reference_data.sh b/tests/update_reference_data.sh
index 56ed6e009..f333094f3 100755
--- a/tests/update_reference_data.sh
+++ b/tests/update_reference_data.sh
@@ -127,6 +127,7 @@ tests[udq_wconprod]="flow udq_actionx UDQ_WCONPROD"
 tests[udq_actionx]="flow udq_actionx UDQ_ACTIONX"
 tests[udq_uadd]="flow udq_actionx UDQ_M1"
 tests[udq_undefined]="flow udq_actionx UDQ_M2"
+tests[udq_in_actionx]="flow udq_actionx UDQ_M3"
 tests[udq_pyaction]="flow udq_actionx PYACTION_WCONPROD"
 tests[spe1_foam]="flow spe1_foam SPE1FOAM"
 tests[wsegsicd]="flow wsegsicd TEST_WSEGSICD"