diff --git a/Overlap/Tests/long_tests.json b/Overlap/Tests/long_tests.json
index 509c7653f518b87208b4aff71bcd9e3e96aa6f14..f1b2f75cdde4faab2a04d1c51f7acb38ddc71fb8 100644
--- a/Overlap/Tests/long_tests.json
+++ b/Overlap/Tests/long_tests.json
@@ -21,5 +21,17 @@
             "1",
             "$my_data_dir/Global_1993_2023/SHPC"
 	]
+    },
+    "EGg_1993_2": {
+	"input": "&config_graph_nml max_delta = 4/\n&MAIN_NML I_SLICE=0/\n",
+	"env": {
+            "mpiexec": "$mpiexec"
+	},
+	"description": "Same as EGg_1993_2023, but with 2 MPI processes.",
+	"command": [
+            "$build_dir/Overlap/eddy_graph.sh",
+            "2",
+            "$my_data_dir/Global_1993_2023/SHPC"
+	]
     }
 }