diff --git a/src/testdir/dumps/Test_prop_insert_start_incl_1.dump b/src/testdir/dumps/Test_prop_insert_start_incl_1.dump
new file mode 100644
index 0000000..deb67d5
--- /dev/null
+++ b/src/testdir/dumps/Test_prop_insert_start_incl_1.dump
@@ -0,0 +1,8 @@
+|t+0&#ffffff0|e|x|t| |a+0#4040ff13&|f|t|e|r| >o+0#0000000&|n|e| |t|e|x|t| |b+0#4040ff13&|e|f|o|r|e| |t+0#0000000&|w|o| @29
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+| +0#0000000&@41|1|,|6|-|1|2| @7|A|l@1| 
diff --git a/src/testdir/dumps/Test_prop_insert_start_incl_2.dump b/src/testdir/dumps/Test_prop_insert_start_incl_2.dump
new file mode 100644
index 0000000..73cf648
--- /dev/null
+++ b/src/testdir/dumps/Test_prop_insert_start_incl_2.dump
@@ -0,0 +1,8 @@
+|t+0&#ffffff0|e|x|t| |a+0#4040ff13&|f|t|e|r| >o+0#0000000&|n|e| |t|e|x|t| |b+0#4040ff13&|e|f|o|r|e| |t+0#0000000&|w|o| @29
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|-+2#0000000&@1| |I|N|S|E|R|T| |-@1| +0&&@29|1|,|6|-|1|2| @7|A|l@1| 
diff --git a/src/testdir/dumps/Test_prop_insert_start_incl_3.dump b/src/testdir/dumps/Test_prop_insert_start_incl_3.dump
new file mode 100644
index 0000000..cc4de01
--- /dev/null
+++ b/src/testdir/dumps/Test_prop_insert_start_incl_3.dump
@@ -0,0 +1,8 @@
+|t+0&#ffffff0|e|x|t| |a+0#4040ff13&|f|t|e|r| |x+0#0000000&>x|o|n|e| |t|e|x|t| |b+0#4040ff13&|e|f|o|r|e| |t+0#0000000&|w|o| @27
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+| +0#0000000&@41|1|,|7|-|1|3| @7|A|l@1| 
diff --git a/src/testdir/dumps/Test_prop_insert_start_incl_4.dump b/src/testdir/dumps/Test_prop_insert_start_incl_4.dump
new file mode 100644
index 0000000..75e2580
--- /dev/null
+++ b/src/testdir/dumps/Test_prop_insert_start_incl_4.dump
@@ -0,0 +1,8 @@
+|t+0&#ffffff0|e|x|t| |a+0#4040ff13&|f|t|e|r| |x+0#0000000&@1|o|n|e| |t|e|x|t| >b+0#4040ff13&|e|f|o|r|e| |t+0#0000000&|w|o| @27
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|-+2#0000000&@1| |I|N|S|E|R|T| |-@1| +0&&@29|1|,|1|7|-|2|3| @6|A|l@1| 
diff --git a/src/testdir/dumps/Test_prop_insert_start_incl_5.dump b/src/testdir/dumps/Test_prop_insert_start_incl_5.dump
new file mode 100644
index 0000000..5cbee12
--- /dev/null
+++ b/src/testdir/dumps/Test_prop_insert_start_incl_5.dump
@@ -0,0 +1,8 @@
+|t+0&#ffffff0|e|x|t| |a+0#4040ff13&|f|t|e|r| |x+0#0000000&@1|o|n|e| |t|e|x|t| |y>y|b+0#4040ff13&|e|f|o|r|e| |t+0#0000000&|w|o| @25
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+| +0#0000000&@41|1|,|1|8|-|2|4| @6|A|l@1| 
diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index b702340..2e72db9 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -2914,4 +2914,35 @@
   bwipe!
 enddef
 
+func Test_insert_text_start_incl()
+  CheckRunVimInTerminal
+
+  let lines =<< trim END
+      vim9script
+      setline(1, 'text one text two')
+
+      prop_type_add('propincl', {highlight: 'NonText', start_incl: true})
+      prop_add(1, 6, {type: 'propincl', text: 'after '})
+      cursor(1, 6)
+      prop_type_add('propnotincl', {highlight: 'NonText', start_incl: false})
+      prop_add(1, 15, {type: 'propnotincl', text: 'before '})
+  END
+  call writefile(lines, 'XscriptPropsStartIncl')
+  let buf = RunVimInTerminal('-S XscriptPropsStartIncl', #{rows: 8, cols: 60})
+  call VerifyScreenDump(buf, 'Test_prop_insert_start_incl_1', {})
+
+  call term_sendkeys(buf, "i")
+  call VerifyScreenDump(buf, 'Test_prop_insert_start_incl_2', {})
+  call term_sendkeys(buf, "xx\<Esc>")
+  call VerifyScreenDump(buf, 'Test_prop_insert_start_incl_3', {})
+
+  call term_sendkeys(buf, "2wi")
+  call VerifyScreenDump(buf, 'Test_prop_insert_start_incl_4', {})
+  call term_sendkeys(buf, "yy\<Esc>")
+  call VerifyScreenDump(buf, 'Test_prop_insert_start_incl_5', {})
+
+  call StopVimInTerminal(buf)
+  call delete('XscriptPropsStartIncl')
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab