diff --git a/sample_files/contiguous_after.js b/sample_files/contiguous_after.js
new file mode 100644
index 000000000..77f2f85ed
--- /dev/null
+++ b/sample_files/contiguous_after.js
@@ -0,0 +1,7 @@
+// There are multiple possible diffs here, but we want to prefer
+// showing A and B on the same line.
+var x = [
+  "A", "B",
+  "A", "B",
+  "C", "D",
+];
diff --git a/sample_files/contiguous_before.js b/sample_files/contiguous_before.js
new file mode 100644
index 000000000..e44c17c02
--- /dev/null
+++ b/sample_files/contiguous_before.js
@@ -0,0 +1,5 @@
+
+var x = [
+  "A", "B",
+  "C", "D",
+];