diff --git a/docs/config.rst b/docs/config.rst
index 76c3a5828c..99a7984499 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -581,21 +581,32 @@ Complete list of settings that you can put into ``testenv*`` sections:
        via the ``-e`` tox will only run those three (even if ``coverage`` may specify as ``depends`` other targets too -
        such as ``py27, py35, py36, py37``).
 
+.. conf:: suicide_timeout ^ float ^ 0.1
+
+    .. versionadded:: 3.15.2
+
+    When an interrupt is sent via Ctrl+C, the SIGINT is sent to all foreground
+    processes. The :conf:``suicide_timeout`` gives the running process time to
+    cleanup and exit before receiving (in some cases, a duplicate) SIGINT from
+    tox.
+
 .. conf:: interrupt_timeout ^ float ^ 0.3
 
     .. versionadded:: 3.15.0
 
-    When tox is interrupted, it propagates the signal to the child process,
-    waits :conf:``interrupt_timeout`` seconds, and sends it a SIGTERM if it hasn't
-    exited.
+    When tox is interrupted, it propagates the signal to the child process
+    after :conf:``suicide_timeout`` seconds. If the process still hasn't exited
+    after :conf:``interrupt_timeout`` seconds, its sends a SIGTERM.
 
 .. conf:: terminate_timeout ^ float ^ 0.2
 
     .. versionadded:: 3.15.0
 
-    When tox is interrupted, it propagates the signal to the child process,
-    waits :conf:``interrupt_timeout`` seconds, sends it a SIGTERM, waits
-    :conf:``terminate_timeout`` seconds, and sends it a SIGKILL if it hasn't exited.
+    When tox is interrupted, after waiting :conf:``interrupt_timeout`` seconds,
+    it propagates the signal to the child process, waits
+    :conf:``interrupt_timeout`` seconds, sends it a SIGTERM, waits
+    :conf:``terminate_timeout`` seconds, and sends it a SIGKILL if it hasn't
+    exited.
 
 Substitutions
 -------------
diff --git a/src/tox/action.py b/src/tox/action.py
index a7f022e2f6..74eec55aa9 100644
--- a/src/tox/action.py
+++ b/src/tox/action.py
@@ -32,6 +32,7 @@ def __init__(
         command_log,
         popen,
         python,
+        suicide_timeout,
         interrupt_timeout,
         terminate_timeout,
     ):
@@ -45,6 +46,7 @@ def __init__(
         self.command_log = command_log
         self._timed_report = None
         self.python = python
+        self.suicide_timeout = suicide_timeout
         self.interrupt_timeout = interrupt_timeout
         self.terminate_timeout = terminate_timeout
 
@@ -188,7 +190,7 @@ def evaluate_cmd(self, input_file_handler, process, redirect):
     def handle_interrupt(self, process):
         """A three level stop mechanism for children - INT -> TERM -> KILL"""
         msg = "from {} {{}} pid {}".format(os.getpid(), process.pid)
-        if process.poll() is None:
+        if self._wait(process, self.suicide_timeout) is None:
             self.info("KeyboardInterrupt", msg.format("SIGINT"))
             process.send_signal(signal.CTRL_C_EVENT if sys.platform == "win32" else signal.SIGINT)
             if self._wait(process, self.interrupt_timeout) is None:
diff --git a/src/tox/config/__init__.py b/src/tox/config/__init__.py
index fd3cb07f04..262cdce935 100644
--- a/src/tox/config/__init__.py
+++ b/src/tox/config/__init__.py
@@ -53,6 +53,7 @@
 
 WITHIN_PROVISION = os.environ.get(str("TOX_PROVISION")) == "1"
 
+SUICIDE_TIMEOUT = 0.1
 INTERRUPT_TIMEOUT = 0.3
 TERMINATE_TIMEOUT = 0.2
 
@@ -827,6 +828,13 @@ def develop(testenv_config, value):
 
     parser.add_testenv_attribute_obj(DepOption())
 
+    parser.add_testenv_attribute(
+        name="suicide_timeout",
+        type="float",
+        default=SUICIDE_TIMEOUT,
+        help="timeout to allow process to exit before sending SIGINT",
+    )
+
     parser.add_testenv_attribute(
         name="interrupt_timeout",
         type="float",
diff --git a/src/tox/venv.py b/src/tox/venv.py
index bf91e19023..6524296be0 100644
--- a/src/tox/venv.py
+++ b/src/tox/venv.py
@@ -130,6 +130,7 @@ def new_action(self, msg, *args):
             command_log,
             self.popen,
             self.envconfig.envpython,
+            self.envconfig.suicide_timeout,
             self.envconfig.interrupt_timeout,
             self.envconfig.terminate_timeout,
         )
diff --git a/tests/unit/config/test_config.py b/tests/unit/config/test_config.py
index 911be6e36b..c1551ddba7 100644
--- a/tests/unit/config/test_config.py
+++ b/tests/unit/config/test_config.py
@@ -175,11 +175,12 @@ def test_is_same_dep(self):
         assert DepOption._is_same_dep("pkg_hello-world3==1.0", "pkg_hello-world3<=2.0")
         assert not DepOption._is_same_dep("pkg_hello-world3==1.0", "otherpkg>=2.0")
 
-    def test_interrupt_terminate_timeout_set_manually(self, newconfig):
+    def test_suicide_interrupt_terminate_timeout_set_manually(self, newconfig):
         config = newconfig(
             [],
             """
             [testenv:dev]
+            suicide_timeout = 30.0
             interrupt_timeout = 5.0
             terminate_timeout = 10.0
 
@@ -187,10 +188,12 @@ def test_interrupt_terminate_timeout_set_manually(self, newconfig):
         """,
         )
         envconfig = config.envconfigs["other"]
+        assert 0.1 == envconfig.suicide_timeout
         assert 0.3 == envconfig.interrupt_timeout
         assert 0.2 == envconfig.terminate_timeout
 
         envconfig = config.envconfigs["dev"]
+        assert 30.0 == envconfig.suicide_timeout
         assert 5.0 == envconfig.interrupt_timeout
         assert 10.0 == envconfig.terminate_timeout