diff --git a/honeycomb/orc.py b/honeycomb/orc.py
index c935ebc..9e146c2 100644
--- a/honeycomb/orc.py
+++ b/honeycomb/orc.py
@@ -244,6 +244,7 @@ def insert_hive_fns_into_col_names(col_names, hive_functions):
             fn_info = hive_functions[col]
             if isinstance(fn_info, str):
                 fn_name = fn_info
+                fn_args = col
             elif isinstance(fn_info, dict):
                 fn_name = fn_info['name']
                 if 'args' in fn_info:
diff --git a/test/test_orc.py b/test/test_orc.py
new file mode 100644
index 0000000..b18670a
--- /dev/null
+++ b/test/test_orc.py
@@ -0,0 +1,58 @@
+from honeycomb.orc import (
+    insert_hive_fns_into_col_names, change_col_dtype_to_hive_fn_output)
+
+
+def test_insert_hive_fns_into_col_names(test_df):
+    col_names = list(test_df.columns)
+    hive_functions = {
+        'intcol': {
+            'name': 'pow',
+            'args': ['.', 2]
+        },
+        'strcol': 'upper',
+        'floatcol': {
+            'name': 'pow',
+            'args': [3, '.']
+        }
+    }
+
+    intcol_ind = col_names.index('intcol')
+    strcol_ind = col_names.index('strcol')
+    floatcol_ind = col_names.index('floatcol')
+
+    col_names = insert_hive_fns_into_col_names(col_names, hive_functions)
+    print(col_names)
+
+    assert col_names[intcol_ind] == 'pow(intcol, 2)'
+    assert col_names[strcol_ind] == 'upper(strcol)'
+    assert col_names[floatcol_ind] == 'pow(3, floatcol)'
+
+
+def test_change_col_dtype_to_hive_fn_output(test_df):
+    col_defs = (
+        test_df.dtypes.to_frame()
+        .reset_index()
+        .rename(columns={'index': 'col_name', 0: 'dtype'})
+    )
+
+    hive_functions = {
+        'intcol': {
+            'name': 'to_binary',
+            'output_type': 'BINARY'
+        },
+        'strcol': 'upper',
+        'floatcol': {
+            'name': 'hex',
+            'output_type': 'STRING'
+        }
+    }
+
+    intcol_ind = col_defs.index[col_defs['col_name'] == 'intcol'][0]
+    strcol_ind = col_defs.index[col_defs['col_name'] == 'strcol'][0]
+    floatcol_ind = col_defs.index[col_defs['col_name'] == 'floatcol'][0]
+
+    col_defs = change_col_dtype_to_hive_fn_output(col_defs, hive_functions)
+
+    assert col_defs.loc[intcol_ind, 'dtype'] == 'BINARY'
+    assert col_defs.loc[strcol_ind, 'dtype'] == 'object'
+    assert col_defs.loc[floatcol_ind, 'dtype'] == 'STRING'