diff --git a/pyproject.toml b/pyproject.toml
index f828b3b..03248ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,11 @@ write_to = "src/legendoptics/_version.py"
 minversion = "6.0"
 addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config"]
 xfail_strict = true
-filterwarnings = "error"
+filterwarnings = [
+    "error",
+    "ignore::PendingDeprecationWarning:pyg4ometry",
+    "ignore::DeprecationWarning"
+]
 log_cli_level = "info"
 testpaths = "tests"
 
diff --git a/tests/test_pyg4.py b/tests/test_pyg4.py
new file mode 100644
index 0000000..098d3d4
--- /dev/null
+++ b/tests/test_pyg4.py
@@ -0,0 +1,59 @@
+import pint
+import pyg4ometry.geant4 as g4
+
+u = pint.get_application_registry()
+
+
+def _create_dummy_mat():
+    reg = g4.Registry()
+    mat = g4.MaterialSingleElement("dummy", 1, 1, 1, reg)
+    return reg, mat
+
+
+def test_pyg4_attach():
+    """Test the attaching of all properties to Geant4 materials."""
+    import legendoptics  # noqa: F401
+    import legendoptics.copper
+    import legendoptics.fibers
+    import legendoptics.germanium
+    import legendoptics.lar
+    import legendoptics.nylon
+    import legendoptics.silicon
+    import legendoptics.tetratex
+    import legendoptics.tpb
+
+    u = pint.get_application_registry()
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.lar.pyg4_lar_attach_rindex(mat, reg)
+    legendoptics.lar.pyg4_lar_attach_attenuation(mat, reg, 90 * u.K)
+    legendoptics.lar.pyg4_lar_attach_scintillation(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.tpb.pyg4_tpb_attach_rindex(mat, reg)
+    legendoptics.tpb.pyg4_tpb_attach_wls(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.fibers.pyg4_fiber_cladding1_attach_rindex(mat, reg)
+    reg, mat = _create_dummy_mat()
+    legendoptics.fibers.pyg4_fiber_cladding1_attach_rindex(mat, reg)
+    reg, mat = _create_dummy_mat()
+    legendoptics.fibers.pyg4_fiber_core_attach_rindex(mat, reg)
+    legendoptics.fibers.pyg4_fiber_core_attach_wls(mat, reg)
+    legendoptics.fibers.pyg4_fiber_core_attach_absorption(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.tetratex.pyg4_tetratex_attach_reflectivity(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.germanium.pyg4_germanium_attach_reflectivity(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.copper.pyg4_copper_attach_reflectivity(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.silicon.pyg4_silicon_attach_complex_rindex(mat, reg)
+
+    reg, mat = _create_dummy_mat()
+    legendoptics.nylon.pyg4_nylon_attach_rindex(mat, reg)
+    legendoptics.nylon.pyg4_nylon_attach_absorption(mat, reg)