diff --git a/.coveragerc b/.coveragerc
index 4a3bb9d4..e044af90 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,3 +1,11 @@
 [run]
 concurrency = multiprocessing
-parallel = true
\ No newline at end of file
+parallel = true
+
+[report]
+exclude_also =
+    raise ValueError
+    raise TypeError
+    raise NotImplementedError
+    raise FileNotFoundError
+    warnings.warn
\ No newline at end of file
diff --git a/test/import_image_test.py b/test/import_image_test.py
index 8a4b388f..7f7f870c 100644
--- a/test/import_image_test.py
+++ b/test/import_image_test.py
@@ -15,7 +15,7 @@
 CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
 
 
-def _convert_to_numpy(as_slice=False):
+def _convert_to_numpy(as_slice=False):  # pragma: no cover
     """
     Helper script for converting NIfTI files to numpy for testing numpy-based imports.
 
@@ -92,7 +92,7 @@ def _convert_to_numpy(as_slice=False):
                 np.save(target_mask_file, arr=source_mask)
 
 
-def _convert_to_flat_directory():
+def _convert_to_flat_directory():  # pragma: no cover
     """
     Helper script for converting soft-tissue sarcoma imaging files to a flat directory.
     :return: