diff --git a/src/testdir/test_display.vim b/src/testdir/test_display.vim
index 199a25f..f439bfe 100644
--- a/src/testdir/test_display.vim
+++ b/src/testdir/test_display.vim
@@ -192,8 +192,6 @@
 
   call VerifyScreenDump(buf, 'Test_long_file_name_1', {})
 
-  call term_sendkeys(buf, ":q\<cr>")
-
   " clean up
   call StopVimInTerminal(buf)
   call delete(longName)
diff --git a/src/testdir/test_ex_mode.vim b/src/testdir/test_ex_mode.vim
index e50e6a5..a72486b 100644
--- a/src/testdir/test_ex_mode.vim
+++ b/src/testdir/test_ex_mode.vim
@@ -92,7 +92,6 @@
   call term_sendkeys(buf, ":vi\<CR>")
   call WaitForAssert({-> assert_match('foo bar', term_getline(buf, 1))}, 1000)
 
-  call term_sendkeys(buf, ":q!\n")
   call StopVimInTerminal(buf)
 endfunc
 
diff --git a/src/testdir/test_excmd.vim b/src/testdir/test_excmd.vim
index 5dbb701..27fdd88 100644
--- a/src/testdir/test_excmd.vim
+++ b/src/testdir/test_excmd.vim
@@ -255,7 +255,6 @@
   call WaitForAssert({-> assert_match('^\[Y\]es, (N)o, (C)ancel: *$',
         \ term_getline(buf, 20))}, 1000)
   call term_sendkeys(buf, "N")
-  call term_sendkeys(buf, ":quit\n")
   call StopVimInTerminal(buf)
 
   call delete('foo')
diff --git a/src/testdir/test_messages.vim b/src/testdir/test_messages.vim
index 2f8e2fa..23e7735 100644
--- a/src/testdir/test_messages.vim
+++ b/src/testdir/test_messages.vim
@@ -265,7 +265,6 @@
   call term_sendkeys(buf, 'q')
   call WaitForAssert({-> assert_equal('100', term_getline(buf, 5))})
 
-  call term_sendkeys(buf, ":q!\n")
   call StopVimInTerminal(buf)
 endfunc
 
@@ -295,7 +294,6 @@
   call WaitForAssert({-> assert_equal('y1', term_getline(buf, 1))})
   call WaitForAssert({-> assert_equal('y2', term_getline(buf, 2))})
 
-  call term_sendkeys(buf, ":q!\n")
   call StopVimInTerminal(buf)
 endfunc
 
diff --git a/src/testdir/test_signals.vim b/src/testdir/test_signals.vim
index cc1c3fb..7a2be89 100644
--- a/src/testdir/test_signals.vim
+++ b/src/testdir/test_signals.vim
@@ -1,6 +1,8 @@
 " Test signal handling.
 
 source check.vim
+source term_util.vim
+
 CheckUnix
 
 source shared.vim
@@ -50,7 +52,7 @@
 " Test signal PWR, which should update the swap file.
 func Test_signal_PWR()
   if !HasSignal('PWR')
-    return
+    throw 'Skipped: PWR signal not supported'
   endif
 
   " Set a very large 'updatetime' and 'updatecount', so that we can be sure
@@ -75,3 +77,32 @@
   bwipe!
   set updatetime& updatecount&
 endfunc
+
+" Test signal INT. Handler sets got_int. It should be like typing CTRL-C.
+func Test_signal_INT()
+  if !HasSignal('INT')
+    throw 'Skipped: INT signal not supported'
+  endif
+
+  " Skip the rest of the test when running with valgrind as signal INT is not
+  " received somehow by Vim when running with valgrind.
+  let cmd = GetVimCommand()
+  if cmd =~ 'valgrind'
+    throw 'Skipped: cannot test signal INT with valgrind'
+  endif
+
+  if !CanRunVimInTerminal()
+    throw 'Skipped: cannot run vim in terminal'
+  endif
+  let buf = RunVimInTerminal('', {'rows': 6})
+  let pid_vim = term_getjob(buf)->job_info().process
+
+  " Check that an endless loop in Vim is interrupted by signal INT.
+  call term_sendkeys(buf, ":while 1 | endwhile\n")
+  call WaitForAssert({-> assert_equal(':while 1 | endwhile', term_getline(buf, 6))})
+  exe 'silent !kill -s INT ' .. pid_vim
+  call term_sendkeys(buf, ":call setline(1, 'INTERUPTED')\n")
+  call WaitForAssert({-> assert_equal('INTERUPTED', term_getline(buf, 1))})
+
+  call StopVimInTerminal(buf)
+endfunc
diff --git a/src/version.c b/src/version.c
index 236e6f7..b8552ed 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    433,
+/**/
     432,
 /**/
     431,