diff --git a/backend/src/agents/agent.py b/backend/src/agents/agent.py
index d189f818..8f831062 100644
--- a/backend/src/agents/agent.py
+++ b/backend/src/agents/agent.py
@@ -1,7 +1,7 @@
 from abc import ABC
 import json
 import logging
-from typing import List, Type, TypeVar, Optional
+from typing import List, Type, TypeVar
 from src.llm import LLM, get_llm
 from src.utils.log_publisher import LogPrefix, publish_log_info
 
diff --git a/backend/src/agents/materiality_agent.py b/backend/src/agents/materiality_agent.py
index c2feda39..dcb36d71 100644
--- a/backend/src/agents/materiality_agent.py
+++ b/backend/src/agents/materiality_agent.py
@@ -2,7 +2,6 @@
 from pathlib import Path
 import logging
 
-from src.agents import agent
 from src.llm import LLMFileFromPath
 from src.agents import Agent
 from src.prompts import PromptEngine
diff --git a/backend/src/agents/report_agent.py b/backend/src/agents/report_agent.py
index 3a5f550d..a2f911d2 100644
--- a/backend/src/agents/report_agent.py
+++ b/backend/src/agents/report_agent.py
@@ -1,7 +1,6 @@
 import json
 import logging
 
-from src.agents import agent
 from src.agents import Agent
 from src.prompts import PromptEngine
 
diff --git a/backend/src/utils/file_utils.py b/backend/src/utils/file_utils.py
index 45571e16..9931b60f 100644
--- a/backend/src/utils/file_utils.py
+++ b/backend/src/utils/file_utils.py
@@ -18,7 +18,7 @@ def handle_file_upload(file: UploadFile) -> FileUpload:
         raise HTTPException(status_code=413, detail=f"File upload must be less than {MAX_FILE_SIZE} bytes")
 
     if not file.filename:
-        raise HTTPException(status_code=400, detail=f"File upload must have a filename")
+        raise HTTPException(status_code=400, detail="Filename missing from file upload")
 
     if "application/pdf" == file.content_type:
         start_time = time.time()
diff --git a/backend/tests/utils/file_utils_test.py b/backend/tests/utils/file_utils_test.py
index 307dbcca..c4c32baa 100644
--- a/backend/tests/utils/file_utils_test.py
+++ b/backend/tests/utils/file_utils_test.py
@@ -7,8 +7,8 @@
 
 from src.utils.file_utils import handle_file_upload
 
-def test_handle_file_upload_size():
 
+def test_handle_file_upload_size():
     with pytest.raises(HTTPException) as err:
         handle_file_upload(UploadFile(file=BinaryIO(), size=15*1024*1024))
 
@@ -17,16 +17,24 @@ def test_handle_file_upload_size():
 
 
 def test_handle_file_upload_unsupported_type():
-
     headers = Headers({"content-type": "text/html"})
     with pytest.raises(HTTPException) as err:
-        handle_file_upload(UploadFile(file=BinaryIO(), size=15*1024, headers=headers))
+        handle_file_upload(UploadFile(file=BinaryIO(), size=15*1024, headers=headers, filename="test.txt"))
 
     assert err.value.status_code == 400
     assert err.value.detail == 'File upload must be supported type (text/plain or application/pdf)'
 
-def test_handle_file_upload_text(mocker):
 
+def test_handle_file_upload_unsupported_type():
+    headers = Headers({"content-type": "text/html"})
+    with pytest.raises(HTTPException) as err:
+        handle_file_upload(UploadFile(file=BytesIO(b"test content"), size=12, headers=headers))
+
+    assert err.value.status_code == 400
+    assert err.value.detail == 'Filename missing from file upload'
+
+
+def test_handle_file_upload_text(mocker):
     mock = mocker.patch("src.utils.file_utils.update_session_file_uploads", MagicMock())
 
     headers = Headers({"content-type": "text/plain"})
@@ -37,7 +45,6 @@ def test_handle_file_upload_text(mocker):
 
 
 def test_handle_file_upload_pdf(mocker):
-
     mock = mocker.patch("src.utils.file_utils.update_session_file_uploads", MagicMock())
     pdf_mock = mocker.patch("src.utils.file_utils.PdfReader", MagicMock())