diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2c30e4e..a21a39f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,6 +31,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Install non-python (homebrew) dependencies
+        if: ${{ matrix.os == 'macOS-latest' }}
+        run: |
+          brew install opencascade cgal gmp mpfr boost
       - name: Get dependencies and install reboost
         run: |
           python -m pip install --upgrade pip wheel setuptools
diff --git a/src/reboost/core.py b/src/reboost/core.py
index 11038bb..ccf1c41 100644
--- a/src/reboost/core.py
+++ b/src/reboost/core.py
@@ -172,10 +172,9 @@ def get_detectors_mapping(
 
     # if no package was imported its just a name
     try:
-        out_names.extend(
-            evaluate_object(output_detector_expression, local_dict={"OBJECTS": objects})
-        )
-    except NameError:
+        objs = evaluate_object(output_detector_expression, local_dict={"OBJECTS": objects})
+        out_names.extend(objs)
+    except Exception:
         out_names.append(output_detector_expression)
 
     # simple one to one mapping
diff --git a/tests/test_core.py b/tests/test_core.py
index 6125dc6..9b89c98 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -146,6 +146,8 @@ def test_detector_mapping():
         "2": ["2"],
     }
 
+    assert reboost.core.get_detectors_mapping("0") == {"0": ["0"]}
+
     # with input name
     assert reboost.core.get_detectors_mapping(
         "[str(i) for i in range(3)]", input_detector_name="dets"
@@ -159,4 +161,8 @@ def test_detector_mapping():
 
 
 def test_remove_columns():
-    pass
+    tab = Table({"a": Array([1, 2, 3]), "b": Array([1, 2, 3])})
+
+    tab = reboost.core.remove_columns(tab, ["a"])
+
+    assert next(iter(tab.keys())) == "a"