diff --git a/janitor/functions/_numba.py b/janitor/functions/_numba.py
index 9ef4bb242..b0c8f2cef 100644
--- a/janitor/functions/_numba.py
+++ b/janitor/functions/_numba.py
@@ -166,7 +166,7 @@ def _numba_equi_join(
     # this also lets us know if there are equi matches
     keep_rows = slice_starts < slice_ends
     if not keep_rows.any():
-        return None, None
+        return None
     if not keep_rows.all():
         left_index = left_index[keep_rows]
         slice_starts = slice_starts[keep_rows]
@@ -247,7 +247,7 @@ def _numba_equi_join(
         )
 
     if left_index is None:
-        return None, None
+        return None
 
     return left_index, right_index
 
@@ -571,14 +571,14 @@ def _numba_single_non_equi_join(
             left=left, right=right, op=op, multiple_conditions=False, keep=keep
         )
         if outcome is None:
-            return None, None
+            return None
         return outcome
 
     outcome = _generic_func_cond_join(
         left=left, right=right, op=op, multiple_conditions=True, keep="all"
     )
     if outcome is None:
-        return None, None
+        return None
     left_index, right_index, starts = outcome
     if op in less_than_join_types:
         counts = right_index.size - starts
@@ -769,7 +769,7 @@ def _numba_multiple_non_equi_join(
             op=op,
         )
         if result is None:
-            return None, None
+            return None
         (
             left_index,
             right_index,
@@ -800,7 +800,7 @@ def _numba_multiple_non_equi_join(
     booleans = starts == right_regions.shape[0]
     # left_region should be <= right_region
     if booleans.all(axis=None):
-        return None, None
+        return None
     if booleans.any(axis=None):
         booleans = ~booleans
         starts = starts[booleans]
@@ -821,7 +821,7 @@ def _numba_multiple_non_equi_join(
 
     booleans = booleans.any(axis=1)
     if booleans.all(axis=None):
-        return None, None
+        return None
     if booleans.any(axis=None):
         booleans = ~booleans
         left_regions = left_regions[booleans]
diff --git a/janitor/functions/conditional_join.py b/janitor/functions/conditional_join.py
index 18734d487..0bd9e6bc7 100644
--- a/janitor/functions/conditional_join.py
+++ b/janitor/functions/conditional_join.py
@@ -543,8 +543,7 @@ def _conditional_join_compute(
             op=op,
             keep=keep,
         )
-        if result[0] is None:
-            result = None
+
     else:
         result = _generic_func_cond_join(
             left=df[left_on],
@@ -767,7 +766,7 @@ def _multiple_conditional_join_eq(
         indices = _numba_equi_join(
             df=left_df, right=right_df, eqs=eqs, ge_gt=ge_gt, le_lt=le_lt
         )
-        if indices[0] is None:
+        if indices is None:
             return None
         if not rest:
             return indices
@@ -875,10 +874,7 @@ def _multiple_conditional_join_le_lt(
             condition for condition in conditions if condition not in gt_lt
         ]
         if (len(gt_lt) > 1) and not conditions:
-            result = _numba_multiple_non_equi_join(df, right, gt_lt, keep=keep)
-            if result[0] is None:
-                return None
-            return result
+            return _numba_multiple_non_equi_join(df, right, gt_lt, keep=keep)
         if len(gt_lt) == 1:
             left_on, right_on, op = gt_lt[0]
             indices = _numba_single_non_equi_join(
@@ -888,7 +884,7 @@ def _multiple_conditional_join_le_lt(
             indices = _numba_multiple_non_equi_join(
                 df, right, gt_lt, keep="all"
             )
-        if indices[0] is None:
+        if indices is None:
             return None
     else:
         # there is an opportunity for optimization for range joins