diff --git a/sentry_sdk/integrations/beam.py b/sentry_sdk/integrations/beam.py
index c88b15b60f..3098f04929 100644
--- a/sentry_sdk/integrations/beam.py
+++ b/sentry_sdk/integrations/beam.py
@@ -79,7 +79,15 @@ def _inspect(self):
             process_func = getattr(self, func_name)
             setattr(self, func_name, _wrap_task_call(process_func))
             setattr(self, wrapped_func, process_func)
-        return getfullargspec(process_func)
+
+        # getfullargspec is deprecated in more recent beam versions and get_function_args_defaults
+        # (which uses Signatures internally) should be used instead.
+        try:
+            from apache_beam.transforms.core import get_function_args_defaults
+
+            return get_function_args_defaults(process_func)
+        except ImportError:
+            return getfullargspec(process_func)
 
     setattr(_inspect, USED_FUNC, True)
     return _inspect
diff --git a/tox.ini b/tox.ini
index be9ff65d11..c79a92452c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,8 +32,8 @@ envlist =
     {pypy,py2.7,py3.5,py3.6,py3.7,py3.8}-celery-{4.1,4.2,4.3}
     {pypy,py2.7}-celery-3
 
-    {py2.7,py3.6}-beam-{12,13}
-    py3.7-beam-{12,13}
+    py2.7-beam-{12,13}
+    py3.7-beam-{12,13, master}
 
     # The aws_lambda tests deploy to the real AWS and have their own matrix of Python versions.
     py3.7-aws_lambda
@@ -98,6 +98,7 @@ deps =
 
     beam-12: apache-beam>=2.12.0, <2.13.0
     beam-13: apache-beam>=2.13.0, <2.14.0
+    beam-master: git+https://github.com/apache/beam#egg=apache-beam&subdirectory=sdks/python
 
     celery-3: Celery>=3.1,<4.0
     celery-4.1: Celery>=4.1,<4.2