diff --git a/src/blenderbim/blenderbim/bim/module/tester/operator.py b/src/blenderbim/blenderbim/bim/module/tester/operator.py
index 4819c05d50..8560462eb2 100644
--- a/src/blenderbim/blenderbim/bim/module/tester/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/tester/operator.py
@@ -27,7 +27,7 @@ import ifctester.reporter
 import ifcopenshell
 import blenderbim.tool as tool
 import blenderbim.bim.handler
-from blenderbim.bim.module.tester.data import TesterData
+from pathlib import Path
 
 
 class ExecuteIfcTester(bpy.types.Operator, tool.Ifc.Operator):
@@ -44,7 +44,7 @@ class ExecuteIfcTester(bpy.types.Operator, tool.Ifc.Operator):
 
         with tempfile.TemporaryDirectory() as dirpath:
             start = time.time()
-            output = os.path.join(dirpath, "{}.html".format(props.specs))
+            output = Path(os.path.join(dirpath, "{}.html".format(props.specs)))
 
             filepath = None
             if props.should_load_from_memory and tool.Ifc.get():
@@ -65,8 +65,15 @@ class ExecuteIfcTester(bpy.types.Operator, tool.Ifc.Operator):
             if props.generate_html_report:
                 engine = ifctester.reporter.Html(specs)
                 engine.report()
-                engine.to_file(output)
-                webbrowser.open("file://" + output)
+                output_path = output.as_posix()
+                engine.to_file(output_path)
+                webbrowser.open(f"file://{output_path}")
+
+            if props.generate_ods_report:
+                engine = ifctester.reporter.Ods(specs)
+                engine.report()
+                output_path = output.with_suffix(".ods").as_posix()
+                engine.to_file(output_path)
 
             report = None
             report = ifctester.reporter.Json(specs).report()["specifications"]
diff --git a/src/blenderbim/blenderbim/bim/module/tester/prop.py b/src/blenderbim/blenderbim/bim/module/tester/prop.py
index 05bb2054ad..a82fb233ce 100644
--- a/src/blenderbim/blenderbim/bim/module/tester/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/tester/prop.py
@@ -52,6 +52,7 @@ class IfcTesterProperties(PropertyGroup):
     ifc_file: StringProperty(default="", name="IFC File")
     should_load_from_memory: BoolProperty(default=False, name="Load from Memory")
     generate_html_report: BoolProperty(default=False, name="Generate HTML report")
+    generate_ods_report: BoolProperty(default=False, name="Generate ODS report")
     flag: BoolProperty(default=False, name="Flag Failed Entities")
     active_specification_index: IntProperty(name="Active Specification Index", update=update_active_specification_index)
     old_index: IntProperty(name="", default=0)
diff --git a/src/blenderbim/blenderbim/bim/module/tester/ui.py b/src/blenderbim/blenderbim/bim/module/tester/ui.py
index 899d52415d..b4ae0bcdad 100644
--- a/src/blenderbim/blenderbim/bim/module/tester/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/tester/ui.py
@@ -44,6 +44,8 @@ class BIM_PT_tester(Panel):
         row = self.layout.row()
         row.prop(props, "generate_html_report")
         row = self.layout.row()
+        row.prop(props, "generate_ods_report")
+        row = self.layout.row()
         row.prop(props, "flag")
 
         if not tool.Ifc.get() or not props.should_load_from_memory:
diff --git a/src/ifctester/ifctester/reporter.py b/src/ifctester/ifctester/reporter.py
index ff78d9c586..9b96eff57c 100644
--- a/src/ifctester/ifctester/reporter.py
+++ b/src/ifctester/ifctester/reporter.py
@@ -150,7 +150,7 @@ class Txt(Console):
     def to_string(self):
         print(self.text)
 
-    def to_file(self, filepath):
+    def to_file(self, filepath: str) -> None:
         with open(filepath, "w", encoding="utf-8") as outfile:
             return outfile.write(self.text)
 
@@ -273,7 +273,7 @@ class Json(Reporter):
 
         return json.dumps(self.results)
 
-    def to_file(self, filepath):
+    def to_file(self, filepath: str) -> None:
         import json
 
         with open(filepath, "w", encoding="utf-8") as outfile:
@@ -302,7 +302,7 @@ class Html(Json):
         with open(os.path.join(cwd, "templates", "report.html"), "r") as file:
             return pystache.render(file.read(), self.results)
 
-    def to_file(self, filepath):
+    def to_file(self, filepath: str) -> None:
         import pystache
 
         with open(os.path.join(cwd, "templates", "report.html"), "r") as file:
@@ -321,7 +321,7 @@ class Ods(Json):
         }
         self.results = {}
 
-    def to_file(self, filepath):
+    def to_file(self, filepath: str) -> None:
         from odf.opendocument import OpenDocumentSpreadsheet
         from odf.style import Style, TableCellProperties
         from odf.table import Table, TableRow, TableCell
@@ -421,7 +421,7 @@ class Ods(Json):
                     table.addElement(tr)
             self.doc.spreadsheet.addElement(table)
 
-        self.doc.save(filepath, True)
+        self.doc.save(filepath, addsuffix=filepath.lower().endswith(".ods"))
 
 
 class Bcf(Json):
@@ -430,7 +430,7 @@ class Bcf(Json):
             {"reason": requirement.failed_reasons[i], "element": e} for i, e in enumerate(requirement.failed_entities)
         ]
 
-    def to_file(self, filepath):
+    def to_file(self, filepath: str) -> None:
         from bcf.v2.bcfxml import BcfXml
 
         unit_scale = None