diff --git a/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml b/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml
index e1a1a6071..f0f66a323 100644
--- a/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml
+++ b/src/tests/fixtures/layouts/parts-total-less-than-100-percent.yaml
@@ -9,6 +9,8 @@
           - direction: Horizontal
             split_size:
               Percent: 50
+            tabs:
+              - direction: Horizontal
         split_size:
           Percent: 80
       - direction: Vertical
diff --git a/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml b/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml
index 33d942253..2b55547d4 100644
--- a/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml
+++ b/src/tests/fixtures/layouts/parts-total-more-than-100-percent.yaml
@@ -9,6 +9,9 @@
           - direction: Horizontal
             split_size:
               Percent: 90
+          - direction: Horizontal
+            tabs:
+              - direction: Horizontal
         split_size:
           Percent: 80
       - direction: Vertical
diff --git a/src/tests/fixtures/layouts/three-panes-with-nesting.yaml b/src/tests/fixtures/layouts/three-panes-with-nesting.yaml
index f1e0dd7e5..20a647f3d 100644
--- a/src/tests/fixtures/layouts/three-panes-with-nesting.yaml
+++ b/src/tests/fixtures/layouts/three-panes-with-nesting.yaml
@@ -1,16 +1,18 @@
 ---
 direction: Horizontal
-parts:
-  - direction: Vertical
+tabs:
+  - direction: Horizontal
     parts:
-      - direction: Horizontal
-        split_size:
-          Percent: 20
-      - direction: Horizontal
+      - direction: Vertical
+        parts:
+          - direction: Horizontal
+            split_size:
+              Percent: 20
+          - direction: Horizontal
+            split_size:
+              Percent: 80
         split_size:
           Percent: 80
-    split_size:
-      Percent: 80
-  - direction: Vertical
-    split_size:
-      Percent: 20
+      - direction: Vertical
+        split_size:
+          Percent: 20