diff --git a/src/ifcbimtester/bimtester/run.py b/src/ifcbimtester/bimtester/run.py
index 6b2411b31f..ad41ecfd90 100644
--- a/src/ifcbimtester/bimtester/run.py
+++ b/src/ifcbimtester/bimtester/run.py
@@ -3,8 +3,13 @@ import sys
 import shutil
 import tempfile
 import ifcopenshell
+try:
+    import ifcopenshell.express
+except:
+    pass # They are using an old version of IfcOpenShell. Gracefully degrade for now.
 import behave.formatter.pretty  # Needed for pyinstaller to package it
 from bimtester.ifc import IfcStore
+from distutils.dir_util import copy_tree
 from behave.__main__ import main as behave_main
 
 
@@ -14,7 +19,6 @@ class TestRunner:
         IfcStore.file = ifc if ifc else ifcopenshell.open(ifc_path)
 
         if schema:
-            import ifcopenshell.express
             schema = ifcopenshell.express.parse(path)
             ifcopenshell.register_schema(schema)
 
@@ -29,9 +33,15 @@ class TestRunner:
     def run(self, args):
         tmpdir = tempfile.mkdtemp()
         features_path = os.path.join(tmpdir, "features")
+        steps_path = os.path.join(features_path, "steps")
         report_json = os.path.join(tmpdir, "report.json")
         shutil.copytree(os.path.join(self.base_path, "features"), features_path)
         shutil.copy(args["feature"], features_path)
+        if args["steps"]:
+            if os.path.isfile(args["steps"]):
+                shutil.copy(args["steps"], steps_path)
+            elif os.path.isdir(args["steps"]):
+                copy_tree(args["steps"], steps_path)
         behave_main(self.get_behave_args(args, features_path, report_json))
         return report_json
 
diff --git a/src/ifcbimtester/cli.py b/src/ifcbimtester/cli.py
old mode 100755
new mode 100644
index 4671c8054b..5fff1cb6ce
--- a/src/ifcbimtester/cli.py
+++ b/src/ifcbimtester/cli.py
@@ -14,6 +14,7 @@ parser.add_argument("-f", "--feature", type=str, help="Specify a feature file to
 parser.add_argument("-i", "--ifc", type=str, help="Specify a ifc file", required=True)
 parser.add_argument("-p", "--path", type=str, help="Define a path for use in tests")
 parser.add_argument("-r", "--report", type=str, help="Specify an output file for a HTML report")
+parser.add_argument("--steps", type=str, help="Specify custom step definitions")
 parser.add_argument("--schema", type=str, help="Specify an output file for a HTML report")
 parser.add_argument("--lang", type=str, help="Specify a language", default="")
 
diff --git a/src/ifcblenderexport/blenderbim/bim/module/bimtester/__init__.py b/src/ifcblenderexport/blenderbim/bim/module/bimtester/__init__.py
index 2a1c4bf008..42feab2dcb 100644
--- a/src/ifcblenderexport/blenderbim/bim/module/bimtester/__init__.py
+++ b/src/ifcblenderexport/blenderbim/bim/module/bimtester/__init__.py
@@ -5,6 +5,7 @@ classes = (
     operator.ExecuteBIMTester,
     operator.BIMTesterPurge,
     operator.SelectFeature,
+    operator.SelectSteps,
     operator.SelectBIMTesterIfcFile,
     operator.RejectElement,
     operator.ApproveClass,
diff --git a/src/ifcblenderexport/blenderbim/bim/module/bimtester/operator.py b/src/ifcblenderexport/blenderbim/bim/module/bimtester/operator.py
index 0ec0a4cf4f..133a44c124 100644
--- a/src/ifcblenderexport/blenderbim/bim/module/bimtester/operator.py
+++ b/src/ifcblenderexport/blenderbim/bim/module/bimtester/operator.py
@@ -29,7 +29,8 @@ class ExecuteBIMTester(bpy.types.Operator):
                 "path": "",
                 "report": report,
                 "schema": "",
-                "lang": "en"
+                "lang": "en",
+                "steps": props.steps
             }
             use_stored_ifc = props.should_load_from_memory and IfcStore.get_file()
             runner = bimtester.run.TestRunner(args["ifc"], ifc=IfcStore.get_file() if use_stored_ifc else None)
@@ -71,6 +72,22 @@ class SelectFeature(bpy.types.Operator):
         return {"RUNNING_MODAL"}
 
 
+class SelectSteps(bpy.types.Operator):
+    bl_idname = "bim.select_steps"
+    bl_label = "Select Steps"
+    filename_ext = ".py"
+    filter_glob: bpy.props.StringProperty(default="*.py", options={"HIDDEN"})
+    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
+
+    def execute(self, context):
+        bpy.context.scene.BimTesterProperties.steps = self.filepath
+        return {"FINISHED"}
+
+    def invoke(self, context, event):
+        context.window_manager.fileselect_add(self)
+        return {"RUNNING_MODAL"}
+
+
 class SelectBIMTesterIfcFile(bpy.types.Operator):
     bl_idname = "bim.select_bimtester_ifc_file"
     bl_label = "Select BIMTester IFC File"
diff --git a/src/ifcblenderexport/blenderbim/bim/module/bimtester/prop.py b/src/ifcblenderexport/blenderbim/bim/module/bimtester/prop.py
index 95a53a4578..c42f56f29f 100644
--- a/src/ifcblenderexport/blenderbim/bim/module/bimtester/prop.py
+++ b/src/ifcblenderexport/blenderbim/bim/module/bimtester/prop.py
@@ -42,6 +42,7 @@ def refreshScenarios(self, context):
 
 class BimTesterProperties(PropertyGroup):
     feature: StringProperty(default="", name="Feature File", update=refreshScenarios)
+    steps: StringProperty(default="", name="Custom Steps")
     ifc_file: StringProperty(default="", name="IFC File")
     audit_ifc_class: EnumProperty(items=getIfcClasses, name="Audit Class")
     qa_reject_element_reason: StringProperty(name="Element Rejection Reason")
diff --git a/src/ifcblenderexport/blenderbim/bim/module/bimtester/ui.py b/src/ifcblenderexport/blenderbim/bim/module/bimtester/ui.py
index b660fbcb7f..b1508ad84f 100644
--- a/src/ifcblenderexport/blenderbim/bim/module/bimtester/ui.py
+++ b/src/ifcblenderexport/blenderbim/bim/module/bimtester/ui.py
@@ -28,6 +28,10 @@ class BIM_PT_qa(Panel):
         row.prop(props, "feature")
         row.operator("bim.select_feature", icon="FILE_FOLDER", text="")
 
+        row = self.layout.row(align=True)
+        row.prop(props, "steps")
+        row.operator("bim.select_steps", icon="FILE_FOLDER", text="")
+
         has_ifc_file = (IfcStore.get_file() and props.should_load_from_memory) or (
             props.ifc_file and not props.should_load_from_memory
         )