diff --git a/src/testdir/dumps/Test_smooth_long_1.dump b/src/testdir/dumps/Test_smooth_long_1.dump
new file mode 100644
index 0000000..a6f4cfb
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_1.dump
@@ -0,0 +1,6 @@
+|L+0&#ffffff0|i|n|e| |w|i|t|h> |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t
+| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+| @21|3|,|1|0| @9|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_2.dump b/src/testdir/dumps/Test_smooth_long_2.dump
new file mode 100644
index 0000000..0c2634f
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_2.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t>s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w
+| @21|3|,|5|0| @9|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_3.dump b/src/testdir/dumps/Test_smooth_long_3.dump
new file mode 100644
index 0000000..c06144c
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_3.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2| +0#0000000&|l|o|t|s| >o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| 
+|l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s
+| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| 
+|t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t
+| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+| @21|3|,|2|5|0| @8|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_4.dump b/src/testdir/dumps/Test_smooth_long_4.dump
new file mode 100644
index 0000000..98f2c62
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_4.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+|x|t| |w|i|t|h| |l>o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w
+| @21|3|,|2|1|0| @8|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_5.dump b/src/testdir/dumps/Test_smooth_long_5.dump
new file mode 100644
index 0000000..901baca
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_5.dump
@@ -0,0 +1,6 @@
+|L+0&#ffffff0|i|n|e| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t
+| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i>t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+| @21|3|,|1|7|0| @8|B|o|t| 
diff --git a/src/testdir/test_scroll_opt.vim b/src/testdir/test_scroll_opt.vim
index 0292fa1..c369fa8 100644
--- a/src/testdir/test_scroll_opt.vim
+++ b/src/testdir/test_scroll_opt.vim
@@ -198,5 +198,33 @@
   call StopVimInTerminal(buf)
 endfunc
 
+func Test_smoothscroll_wrap_long_line()
+  CheckScreendump
+
+  let lines =<< trim END
+      vim9script
+      setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(30))])
+      set smoothscroll scrolloff=0
+      normal 3G10|zt
+  END
+  call writefile(lines, 'XSmoothWrap', 'D')
+  let buf = RunVimInTerminal('-S XSmoothWrap', #{rows: 6, cols: 40})
+  call VerifyScreenDump(buf, 'Test_smooth_long_1', {})
+
+  " scrolling up, cursor moves screen line down
+  call term_sendkeys(buf, "\<C-E>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_2', {})
+  call term_sendkeys(buf, "5\<C-E>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_3', {})
+
+  " scrolling down, cursor moves screen line up
+  call term_sendkeys(buf, "5\<C-Y>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_4', {})
+  call term_sendkeys(buf, "\<C-Y>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_5', {})
+
+  call StopVimInTerminal(buf)
+endfunc
+
 
 " vim: shiftwidth=2 sts=2 expandtab