diff --git a/scripts/code.py b/scripts/code.py
index 17a91599..bb004c3d 100755
--- a/scripts/code.py
+++ b/scripts/code.py
@@ -752,7 +752,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -820,7 +820,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/cov.py b/scripts/cov.py
index 37ac7b72..65775e58 100755
--- a/scripts/cov.py
+++ b/scripts/cov.py
@@ -613,7 +613,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -681,7 +681,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/csv.py b/scripts/csv.py
index b9d9e684..5c59bc9b 100755
--- a/scripts/csv.py
+++ b/scripts/csv.py
@@ -1888,7 +1888,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -1956,7 +1956,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/ctx.py b/scripts/ctx.py
index b250c640..8a2fcb54 100755
--- a/scripts/ctx.py
+++ b/scripts/ctx.py
@@ -995,6 +995,7 @@ def table(Result, results, diff_results=None, *,
     def table_recurse(results_, diff_results_,
             depth_,
             prefixes=('', '', '', '')):
+
         # build the children table at each layer
         table_ = {
                 ','.join(str(getattr(r, k)
@@ -1010,7 +1011,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -1078,7 +1079,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/data.py b/scripts/data.py
index 00ad4ee0..3665d8cf 100755
--- a/scripts/data.py
+++ b/scripts/data.py
@@ -752,7 +752,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -820,7 +820,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/perf.py b/scripts/perf.py
index e731dc63..4aa31f6a 100755
--- a/scripts/perf.py
+++ b/scripts/perf.py
@@ -1114,7 +1114,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -1182,7 +1182,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/perfbd.py b/scripts/perfbd.py
index 30f6497d..645dda3c 100755
--- a/scripts/perfbd.py
+++ b/scripts/perfbd.py
@@ -1084,7 +1084,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -1152,7 +1152,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/stack.py b/scripts/stack.py
index 75f191b1..405635e7 100755
--- a/scripts/stack.py
+++ b/scripts/stack.py
@@ -756,7 +756,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -824,7 +824,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",
diff --git a/scripts/structs.py b/scripts/structs.py
index ae885b32..93a1d760 100755
--- a/scripts/structs.py
+++ b/scripts/structs.py
@@ -830,7 +830,7 @@ def table(Result, results, diff_results=None, *,
                     for r in diff_results_ or []}
         names_ = [n
                 for n in table_.keys() | diff_table_.keys()
-                if diff_results_ is None
+                if diff_results is None
                     or all_
                     or any(
                         types[k].ratio(
@@ -898,7 +898,7 @@ def table(Result, results, diff_results=None, *,
             if name in table_ and depth_ > 1:
                 table_recurse(
                         getattr(r, Result._children),
-                        getattr(diff_r, Result._children, None) or [],
+                        getattr(diff_r, Result._children, None),
                         depth_-1,
                         (prefixes[2+(i==len(names_)-1)] + "|-> ",
                          prefixes[2+(i==len(names_)-1)] + "'-> ",