diff --git a/src/testdir/dumps/Test_diff_rnu_01.dump b/src/testdir/dumps/Test_diff_rnu_01.dump
new file mode 100644
index 0000000..dc7c0f9
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_rnu_01.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&|1+0#af5f00255&| @2>a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|1| |a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|2| |a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|x+2#0000000#ff404010| +0&#ffd7ff255@33||+1&#ffffff0| +0#af5f00255&@1|3| |y+2#0000000#ff404010| +0&#ffd7ff255@31
+| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#af5f00255&@3|-+0#4040ff13#afffff255@32
+| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#af5f00255&@3|-+0#4040ff13#afffff255@32
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|4| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|5| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|6| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|7| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|8| |b+0#0000000&| @31
+|~+0#4040ff13&| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|[+1#0000000&|N|o| |N|a|m|e|]| |[|+|]| @5|1|,|1| @11|A|l@1| |[+3&&|N|o| |N|a|m|e|]| |[|+|]| @5|1|,|1| @11|A|l@1
+| +0&&@74
diff --git a/src/testdir/dumps/Test_diff_rnu_02.dump b/src/testdir/dumps/Test_diff_rnu_02.dump
new file mode 100644
index 0000000..32ffc40
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_rnu_02.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|1| |a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&|2+0#af5f00255&| @2>a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|1| |a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|x+2#0000000#ff404010| +0&#ffd7ff255@33||+1&#ffffff0| +0#af5f00255&@1|2| |y+2#0000000#ff404010| +0&#ffd7ff255@31
+| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#af5f00255&@3|-+0#4040ff13#afffff255@32
+| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#af5f00255&@3|-+0#4040ff13#afffff255@32
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|3| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|4| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|5| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|6| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|7| |b+0#0000000&| @31
+|~+0#4040ff13&| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|[+1#0000000&|N|o| |N|a|m|e|]| |[|+|]| @5|2|,|1| @11|A|l@1| |[+3&&|N|o| |N|a|m|e|]| |[|+|]| @5|2|,|1| @11|A|l@1
+| +0&&@74
diff --git a/src/testdir/dumps/Test_diff_rnu_03.dump b/src/testdir/dumps/Test_diff_rnu_03.dump
new file mode 100644
index 0000000..8c8b938
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_rnu_03.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|2| |a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|1| |a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|a+0#0000000#ffffff0| @33||+1&&|3+0#af5f00255&| @2>a+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|x+2#0000000#ff404010| +0&#ffd7ff255@33||+1&#ffffff0| +0#af5f00255&@1|1| |y+2#0000000#ff404010| +0&#ffd7ff255@31
+| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#af5f00255&@3|-+0#4040ff13#afffff255@32
+| +0#0000e05#a8a8a8255@1|x+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#af5f00255&@3|-+0#4040ff13#afffff255@32
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|2| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|3| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|4| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|5| |b+0#0000000&| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0| @33||+1&&| +0#af5f00255&@1|6| |b+0#0000000&| @31
+|~+0#4040ff13&| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|[+1#0000000&|N|o| |N|a|m|e|]| |[|+|]| @5|3|,|1| @11|A|l@1| |[+3&&|N|o| |N|a|m|e|]| |[|+|]| @5|3|,|1| @11|A|l@1
+| +0&&@74
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index a251d3f..4544834 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -1093,4 +1093,29 @@
   %bwipe!
 endfunc
 
+func Test_diff_rnu()
+  CheckScreendump
+
+  let content =<< trim END
+    call setline(1, ['a', 'a', 'a', 'y', 'b', 'b', 'b', 'b', 'b'])
+    vnew
+    call setline(1, ['a', 'a', 'a', 'x', 'x', 'x', 'b', 'b', 'b', 'b', 'b'])
+    windo diffthis
+    setlocal number rnu foldcolumn=0
+  END
+  call writefile(content, 'Xtest_diff_rnu')
+  let buf = RunVimInTerminal('-S Xtest_diff_rnu', {})
+
+  call VerifyScreenDump(buf, 'Test_diff_rnu_01', {})
+
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_rnu_02', {})
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_rnu_03', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('Xtest_diff_rnu')
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab