diff --git a/src/ifcbimtester/README.md b/src/ifcbimtester/README.md
new file mode 100644
index 0000000000..a02d4bf267
--- /dev/null
+++ b/src/ifcbimtester/README.md
@@ -0,0 +1,18 @@
+# BIMTester
+### Packages to be installed
++ behave
++ pystache
++ ifcopenshell
+
+
+### Start bimtester Gui from a shell
+```
+python3 ./bimtester.py -g
+```
+
+### Create a binary out of the Python package
++ The commands needs to be updated
++ Unix:
+`$ pyinstaller --onefile --clean --icon=icon.ico --add-data "features:features" bimtester.py`
++ Windows:
+ `$ pyinstaller --onefile --clean --icon=icon.ico --add-data "features;features" bimtester.py`
diff --git a/src/ifcbimtester/bimtester.py b/src/ifcbimtester/bimtester.py
index c33121b6fd..1847126024 100644
--- a/src/ifcbimtester/bimtester.py
+++ b/src/ifcbimtester/bimtester.py
@@ -1,10 +1,5 @@
 #!/usr/bin/env python3
 
-# Unix:
-# $ pyinstaller --onefile --clean --icon=icon.ico --add-data "features:features" bimtester.py`
-# Windows:
-# $ pyinstaller --onefile --clean --icon=icon.ico --add-data "features;features" bimtester.py`
-
 import argparse
 
 from bimtester import clean
@@ -12,14 +7,66 @@ from bimtester import reports
 from bimtester import run
 
 
+def show_widget():
+
+    import sys
+    from PySide2 import QtWidgets
+
+    from bimtester.guiwidget import GuiWidgetBimTester
+
+    # Create the Qt Application
+    app = QtWidgets.QApplication(sys.argv)
+
+    # Create and show the form
+    form = GuiWidgetBimTester()
+    form.show()
+
+    # Run the main Qt loop
+    sys.exit(app.exec_())
+
+
 if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description="Runs unit tests for BIM data")
-    parser.add_argument("-p", "--purge", action="store_true", help="Purge tests of deleted elements")
-    parser.add_argument("-r", "--report", action="store_true", help="Generate a HTML report")
-    parser.add_argument("-c", "--console", action="store_true", help="Show results in the console")
-    parser.add_argument("-f", "--feature", type=str, help="Specify a feature file to test", default="")
+
+    parser = argparse.ArgumentParser(
+        description="Runs unit tests for BIM data"
+    )
     parser.add_argument(
-        "-a", "--advanced-arguments", type=str, help="Specify your own arguments to Python's Behave", default=""
+        "-p",
+        "--purge",
+        action="store_true",
+        help="Purge tests of deleted elements"
+    )
+    parser.add_argument(
+        "-r",
+        "--report",
+        action="store_true",
+        help="Generate a HTML report"
+    )
+    parser.add_argument(
+        "-c",
+        "--console",
+        action="store_true",
+        help="Show results in the console"
+    )
+    parser.add_argument(
+        "-f",
+        "--feature",
+        type=str,
+        help="Specify a feature file to test",
+        default=""
+    )
+    parser.add_argument(
+        "-a",
+        "--advanced-arguments",
+        type=str,
+        help="Specify your own arguments to Python's Behave",
+        default=""
+    )
+    parser.add_argument(
+        "-g",
+        "--gui",
+        action="store_true",
+        help="Start with gui",
     )
     args = vars(parser.parse_args())
 
@@ -27,6 +74,8 @@ if __name__ == "__main__":
         clean.TestPurger().purge()
     elif args["report"]:
         reports.generate_report()
+    elif args["gui"]:
+        show_widget()
     else:
         run.run_tests(args)
     print("# All tasks are complete :-)")
diff --git a/src/ifcbimtester/bimtester/features/steps/classification.py b/src/ifcbimtester/bimtester/features/steps/classification.py
index 40f2201252..3ed1e8d35a 100644
--- a/src/ifcbimtester/bimtester/features/steps/classification.py
+++ b/src/ifcbimtester/bimtester/features/steps/classification.py
@@ -1,6 +1,9 @@
 import json
 from behave import step
-from utils import IfcFile, assert_attribute, assert_type
+
+from utils import assert_attribute
+from utils import assert_type
+from utils import IfcFile
 
 
 def get_classification(name):
diff --git a/src/ifcbimtester/bimtester/features/steps/element_classes.py b/src/ifcbimtester/bimtester/features/steps/element_classes.py
index a3908ce2b6..07ea37ffce 100644
--- a/src/ifcbimtester/bimtester/features/steps/element_classes.py
+++ b/src/ifcbimtester/bimtester/features/steps/element_classes.py
@@ -1,5 +1,8 @@
 from behave import step
-from utils import IfcFile, assert_attribute, assert_type
+
+from utils import assert_attribute
+from utils import assert_type
+from utils import IfcFile
 
 
 @step("The element {guid} is an {ifc_class} only")
diff --git a/src/ifcbimtester/bimtester/features/steps/project_setup.py b/src/ifcbimtester/bimtester/features/steps/project_setup.py
index c8abb39ca2..14fc480fa3 100644
--- a/src/ifcbimtester/bimtester/features/steps/project_setup.py
+++ b/src/ifcbimtester/bimtester/features/steps/project_setup.py
@@ -1,6 +1,7 @@
 from behave import step
+
+from utils import assert_attribute
 from utils import IfcFile
-from utils import IfcFile, assert_attribute
 
 
 @step('The IFC file "{file}" must be provided')
diff --git a/src/ifcbimtester/bimtester/features/steps/steps.py b/src/ifcbimtester/bimtester/features/steps/steps.py
index 4d48bde68e..8627efd419 100644
--- a/src/ifcbimtester/bimtester/features/steps/steps.py
+++ b/src/ifcbimtester/bimtester/features/steps/steps.py
@@ -1,4 +1,5 @@
 from behave import step
+
 from utils import IfcFile
 
 
diff --git a/src/ifcbimtester/bimtester/run.py b/src/ifcbimtester/bimtester/run.py
index c64c54372f..4d4cbea046 100644
--- a/src/ifcbimtester/bimtester/run.py
+++ b/src/ifcbimtester/bimtester/run.py
@@ -107,6 +107,25 @@ run.run_all(myfeatures_path, myfeatures_path)
 # like German Umlaute behave gives an error
 
 
+# TODO: change run_intmp_tests() and run_all()
+# arguments feature_path and ifc_file
+#
+# both is given:
+# replace the ifc in feature files
+#
+# feature_path only is given:
+# use the ifc provided in the feature files
+#
+# ifc_file only is given:
+# assume feature files are in the directory of the ifc
+#
+# none of both is given:
+# use current directory and the ifc from feature files
+
+
+# TODO: add arg for run_intmp_tests() to bimtester.py
+
+
 def run_intmp_tests(args={}):
 
     from behave import __version__ as behave_version
diff --git a/src/ifcbimtester/guibimtester.py b/src/ifcbimtester/guibimtester.py
deleted file mode 100644
index 000e4507a9..0000000000
--- a/src/ifcbimtester/guibimtester.py
+++ /dev/null
@@ -1,22 +0,0 @@
-# TODO merge into bimtester module
-
-import sys
-from PySide2 import QtWidgets
-
-from bimtester.guiwidget import GuiWidgetBimTester
-
-
-def show_widget():
-
-    # Create the Qt Application
-    app = QtWidgets.QApplication(sys.argv)
-
-    # Create and show the form
-    form = GuiWidgetBimTester()
-    form.show()
-
-    # Run the main Qt loop
-    sys.exit(app.exec_())
-
-if __name__ == '__main__':
-    show_widget()