diff --git a/changelogs/fragments/ansible-test-argcomplete-3.yml b/changelogs/fragments/ansible-test-argcomplete-3.yml
new file mode 100644
index 00000000000..0c0b01b5d06
--- /dev/null
+++ b/changelogs/fragments/ansible-test-argcomplete-3.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - ansible-test - Add support for ``argcomplete`` version 3.
diff --git a/test/lib/ansible_test/_internal/cli/argparsing/argcompletion.py b/test/lib/ansible_test/_internal/cli/argparsing/argcompletion.py
index 219c33f4ffb..26abcf82fd2 100644
--- a/test/lib/ansible_test/_internal/cli/argparsing/argcompletion.py
+++ b/test/lib/ansible_test/_internal/cli/argparsing/argcompletion.py
@@ -17,10 +17,19 @@ class Substitute:
 try:
     import argcomplete
 
-    from argcomplete import (
-        CompletionFinder,
-        default_validator,
-    )
+    try:
+        # argcomplete 3+
+        # see: https://github.com/kislyuk/argcomplete/commit/bd781cb08512b94966312377186ebc5550f46ae0
+        from argcomplete.finders import (
+            CompletionFinder,
+            default_validator,
+        )
+    except ImportError:
+        # argcomplete <3
+        from argcomplete import (
+            CompletionFinder,
+            default_validator,
+        )
 
     warn = argcomplete.warn  # pylint: disable=invalid-name
 except ImportError:
@@ -72,7 +81,13 @@ class CompType(enum.Enum):
 def register_safe_action(action_type: t.Type[argparse.Action]) -> None:
     """Register the given action as a safe action for argcomplete to use during completion if it is not already registered."""
     if argcomplete and action_type not in argcomplete.safe_actions:
-        argcomplete.safe_actions += (action_type,)
+        if isinstance(argcomplete.safe_actions, set):
+            # argcomplete 3+
+            # see: https://github.com/kislyuk/argcomplete/commit/bd781cb08512b94966312377186ebc5550f46ae0
+            argcomplete.safe_actions.add(action_type)
+        else:
+            # argcomplete <3
+            argcomplete.safe_actions += (action_type,)
 
 
 def get_comp_type() -> t.Optional[CompType]:
diff --git a/test/lib/ansible_test/_util/controller/sanity/mypy/ansible-test.ini b/test/lib/ansible_test/_util/controller/sanity/mypy/ansible-test.ini
index 190e9529a0a..55738f87c62 100644
--- a/test/lib/ansible_test/_util/controller/sanity/mypy/ansible-test.ini
+++ b/test/lib/ansible_test/_util/controller/sanity/mypy/ansible-test.ini
@@ -14,6 +14,9 @@ disable_error_code = misc
 [mypy-argcomplete]
 ignore_missing_imports = True
 
+[mypy-argcomplete.finders]
+ignore_missing_imports = True
+
 [mypy-coverage]
 ignore_missing_imports = True