diff --git a/scripts/matlab/compare_ecef2eci.py b/scripts/matlab/compare_ecef2eci.py
index c2f7aff..8aeb856 100644
--- a/scripts/matlab/compare_ecef2eci.py
+++ b/scripts/matlab/compare_ecef2eci.py
@@ -4,6 +4,7 @@
 """
 
 from __future__ import annotations
+import argparse
 import logging
 from datetime import datetime
 
@@ -56,13 +57,19 @@ def compare_eci2ecef(eng, eci, utc) -> bool:
     return ok
 
 
-eng = matlab_engine()
-
 ecef = [-5762640.0, -1682738.0, 3156028.0]
 eci = [-3009680.518620539, 5194367.153184303, 3156028.0]
 utc_py = datetime(2019, 1, 4, 12)
 
-print("Aerospace Toolbox:", has_aerospace(eng))
+p = argparse.ArgumentParser(description="compare ecef eci")
+p.add_argument(
+    "-f", "--force_matmap3d", help="use matmap3d instead of Matlab OEM Toolbox", action="store_true"
+)
+P = p.parse_args()
+
+eng = matlab_engine()
+
+print("Mapping Toolbox:", has_aerospace(eng, P.force_matmap3d))
 
 if ecef2eci_ok := compare_ecef2eci(eng, ecef, utc_py):
     print("OK: PyMap3d ecef2eci vs. Matlab ecef2eci")
diff --git a/scripts/matlab/compare_lox.py b/scripts/matlab/compare_lox.py
index 2673146..f14a279 100644
--- a/scripts/matlab/compare_lox.py
+++ b/scripts/matlab/compare_lox.py
@@ -2,8 +2,9 @@
 """
 Compare with Matlab Mapping toolbox reckon()
 """
-from __future__ import annotations
 
+from __future__ import annotations
+import argparse
 import logging
 from math import isclose
 
@@ -41,11 +42,17 @@ def stability(eng) -> bool:
     return ok
 
 
+p = argparse.ArgumentParser(description="compare reckon loxodrome")
+p.add_argument(
+    "-f", "--force_matmap3d", help="use matmap3d instead of Matlab OEM Toolbox", action="store_true"
+)
+P = p.parse_args()
+
 eng = matlab_engine()
 
-print("Mapping Toolbox:", has_mapping(eng))
+print("Mapping Toolbox:", has_mapping(eng, P.force_matmap3d))
 
 if stability(eng):
-    print("OK: lox_stability: comparison: Mapp")
+    print("OK: lox_stability: comparison")
 else:
     raise ValueError("FAIL: lox_stability comparison")
diff --git a/scripts/matlab/compare_vdist.py b/scripts/matlab/compare_vdist.py
index 75d3c97..00d9ceb 100644
--- a/scripts/matlab/compare_vdist.py
+++ b/scripts/matlab/compare_vdist.py
@@ -4,7 +4,7 @@
 """
 
 from __future__ import annotations
-
+import argparse
 import logging
 from math import isclose, nan
 import numpy as np
@@ -53,9 +53,15 @@ def stability(eng) -> bool:
     return ok
 
 
+p = argparse.ArgumentParser(description="compare vdist")
+p.add_argument(
+    "-f", "--force_matmap3d", help="use matmap3d instead of Matlab OEM Toolbox", action="store_true"
+)
+P = p.parse_args()
+
 eng = matlab_engine()
 
-print("Mapping Toolbox:", has_mapping(eng))
+print("Mapping Toolbox:", has_mapping(eng, P.force_matmap3d))
 
 if stability(eng):
     print("OK: vdist compare")
diff --git a/scripts/matlab/compare_vreckon.py b/scripts/matlab/compare_vreckon.py
index 034bf12..a557b83 100644
--- a/scripts/matlab/compare_vreckon.py
+++ b/scripts/matlab/compare_vreckon.py
@@ -4,7 +4,7 @@
 """
 
 from __future__ import annotations
-
+import argparse
 import logging
 from math import isclose, nan
 import numpy as np
@@ -80,9 +80,15 @@ def unit(eng) -> bool:
     return ok
 
 
+p = argparse.ArgumentParser(description="compare vreckon")
+p.add_argument(
+    "-f", "--force_matmap3d", help="use matmap3d instead of Matlab OEM Toolbox", action="store_true"
+)
+P = p.parse_args()
+
 eng = matlab_engine()
 
-print("Mapping Toolbox:", has_mapping(eng))
+print("Mapping Toolbox:", has_mapping(eng, P.force_matmap3d))
 
 if unit(eng) and stability(eng):
     print("OK: vreckon compare")
diff --git a/scripts/matlab/matlab_engine.py b/scripts/matlab/matlab_engine.py
index cc2fd27..12380d2 100644
--- a/scripts/matlab/matlab_engine.py
+++ b/scripts/matlab/matlab_engine.py
@@ -41,7 +41,14 @@ def has_matmap3d(eng) -> bool:
 
 
 @functools.cache
-def has_aerospace(eng: matlab.engine.matlabengine.MatlabEngine) -> bool:
+def has_aerospace(
+    eng: matlab.engine.matlabengine.MatlabEngine, force_matmap3d: bool = False
+) -> bool:
+    if force_matmap3d:
+        if not has_matmap3d(eng):
+            raise EnvironmentError("did not find MatMap3d")
+        return False
+
     if eng.matlab_toolbox()["aerospace"]:
         return True
 
@@ -51,7 +58,12 @@ def has_aerospace(eng: matlab.engine.matlabengine.MatlabEngine) -> bool:
     return False
 
 
-def has_mapping(eng: matlab.engine.matlabengine.MatlabEngine) -> bool:
+def has_mapping(eng: matlab.engine.matlabengine.MatlabEngine, force_matmap3d: bool = False) -> bool:
+    if force_matmap3d:
+        if not has_matmap3d(eng):
+            raise EnvironmentError("did not find MatMap3d")
+        return False
+
     if eng.matlab_toolbox()["mapping"]:
         return True