diff --git a/editing/data/insertparagraph.js b/editing/data/insertparagraph.js
index 21eb4579c7d99d..784678161243b4 100644
--- a/editing/data/insertparagraph.js
+++ b/editing/data/insertparagraph.js
@@ -1990,4 +1990,109 @@ var browserTests = [
      "<dl contenteditable=\"false\"><dd contenteditable=\"\"><div>ab</div><div>cd<br></div>/dd></dl>"],
     [true,true],
     {"insertparagraph":[false,false,"",false,false,""]}],
+
+// The first white-space of the second paragraph must be &nbsp; for making it
+// visible, but the other things do not matter for the following tests.
+["<div>a[] b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    "<div>a</div><div>&nbsp;b</div>",
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+// And if the first paragraph ends with white-space, the text node should be
+// followed by <br> element.
+["<div>a []b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a <br></div><div>b</div>",
+     "<div>a&nbsp;</div><div>b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a&nbsp;[] b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a <br></div><div>&nbsp;b</div>",
+     "<div>a&nbsp;</div><div>&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a []&nbsp;b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a <br></div><div>&nbsp;b</div>",
+     "<div>a&nbsp;</div><div>&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+// These tests do not mind about the white-space sequence because it's not
+// important here.  That's tested by
+// editing/other/white-spaces-after-execCommand-*.tentative.html
+["<div>a&nbsp;[]&nbsp; b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a&nbsp;[] &nbsp;b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a []&nbsp; b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a&nbsp;&nbsp;[]&nbsp; b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a&nbsp; <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a &nbsp;</div><div>&nbsp; b</div>",
+     "<div>a&nbsp; <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp;&nbsp;b</div>",
+     "<div>a &nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a&nbsp; []&nbsp; b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a&nbsp; <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a &nbsp;</div><div>&nbsp; b</div>",
+     "<div>a&nbsp; <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp;&nbsp;b</div>",
+     "<div>a &nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a &nbsp;[]&nbsp; b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a&nbsp; <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a &nbsp;</div><div>&nbsp; b</div>",
+     "<div>a&nbsp; <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp;&nbsp;b</div>",
+     "<div>a &nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a&nbsp;&nbsp;[] &nbsp;b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a&nbsp; <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a &nbsp;</div><div>&nbsp; b</div>",
+     "<div>a&nbsp; <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp;&nbsp;b</div>",
+     "<div>a &nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>a &nbsp;[] &nbsp;b</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>a&nbsp; <br></div><div>&nbsp; b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp; b</div>",
+     "<div>a &nbsp;</div><div>&nbsp; b</div>",
+     "<div>a&nbsp; <br></div><div>&nbsp;&nbsp;b</div>",
+     "<div>a&nbsp;&nbsp;</div><div>&nbsp;&nbsp;b</div>",
+     "<div>a &nbsp;</div><div>&nbsp;&nbsp;b</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
 ]