diff --git a/sentry_sdk/integrations/_asgi_common.py b/sentry_sdk/integrations/_asgi_common.py
index 17a88523e5..a099b42e32 100644
--- a/sentry_sdk/integrations/_asgi_common.py
+++ b/sentry_sdk/integrations/_asgi_common.py
@@ -1,6 +1,6 @@
 import urllib
 
-from sentry_sdk.hub import _should_send_default_pii
+from sentry_sdk.scope import should_send_default_pii
 from sentry_sdk.integrations._wsgi_common import _filter_headers
 from sentry_sdk._types import TYPE_CHECKING
 
@@ -101,7 +101,7 @@ def _get_request_data(asgi_scope):
         )
 
     client = asgi_scope.get("client")
-    if client and _should_send_default_pii():
+    if client and should_send_default_pii():
         request_data["env"] = {"REMOTE_ADDR": _get_ip(asgi_scope)}
 
     return request_data
diff --git a/sentry_sdk/integrations/gnu_backtrace.py b/sentry_sdk/integrations/gnu_backtrace.py
index f8321a6cd7..32d2afafbf 100644
--- a/sentry_sdk/integrations/gnu_backtrace.py
+++ b/sentry_sdk/integrations/gnu_backtrace.py
@@ -1,6 +1,6 @@
 import re
 
-from sentry_sdk.hub import Hub
+import sentry_sdk
 from sentry_sdk.integrations import Integration
 from sentry_sdk.scope import add_global_event_processor
 from sentry_sdk.utils import capture_internal_exceptions
@@ -49,7 +49,7 @@ def process_gnu_backtrace(event, hint):
 
 def _process_gnu_backtrace(event, hint):
     # type: (Event, dict[str, Any]) -> Event
-    if Hub.current.get_integration(GnuBacktraceIntegration) is None:
+    if sentry_sdk.get_client().get_integration(GnuBacktraceIntegration) is None:
         return event
 
     exc_info = hint.get("exc_info", None)
diff --git a/sentry_sdk/integrations/wsgi.py b/sentry_sdk/integrations/wsgi.py
index f946844de5..117582ea2f 100644
--- a/sentry_sdk/integrations/wsgi.py
+++ b/sentry_sdk/integrations/wsgi.py
@@ -6,7 +6,7 @@
 from sentry_sdk._werkzeug import get_host, _get_headers
 from sentry_sdk.api import continue_trace
 from sentry_sdk.consts import OP
-from sentry_sdk.hub import _should_send_default_pii
+from sentry_sdk.scope import should_send_default_pii
 from sentry_sdk.integrations._wsgi_common import _filter_headers
 from sentry_sdk.sessions import (
     auto_session_tracking_scope as auto_session_tracking,
@@ -143,7 +143,7 @@ def _get_environ(environ):
     capture (server name, port and remote addr if pii is enabled).
     """
     keys = ["SERVER_NAME", "SERVER_PORT"]
-    if _should_send_default_pii():
+    if should_send_default_pii():
         # make debugging of proxy setup easier. Proxy headers are
         # in headers.
         keys += ["REMOTE_ADDR"]
@@ -266,7 +266,7 @@ def event_processor(event, hint):
             # if the code below fails halfway through we at least have some data
             request_info = event.setdefault("request", {})
 
-            if _should_send_default_pii():
+            if should_send_default_pii():
                 user_info = event.setdefault("user", {})
                 if client_ip:
                     user_info.setdefault("ip_address", client_ip)
diff --git a/sentry_sdk/metrics.py b/sentry_sdk/metrics.py
index f750e834a2..dfc1d89734 100644
--- a/sentry_sdk/metrics.py
+++ b/sentry_sdk/metrics.py
@@ -720,20 +720,18 @@ def _tags_to_dict(tags):
 
 def _get_aggregator():
     # type: () -> Optional[MetricsAggregator]
-    hub = sentry_sdk.Hub.current
-    client = hub.client
+    client = sentry_sdk.get_client()
     return (
         client.metrics_aggregator
-        if client is not None and client.metrics_aggregator is not None
+        if client.is_active() and client.metrics_aggregator is not None
         else None
     )
 
 
 def _get_aggregator_and_update_tags(key, value, unit, tags):
     # type: (str, Optional[MetricValue], MeasurementUnit, Optional[MetricTags]) -> Tuple[Optional[MetricsAggregator], Optional[LocalAggregator], Optional[MetricTags]]
-    hub = sentry_sdk.Hub.current
-    client = hub.client
-    if client is None or client.metrics_aggregator is None:
+    client = sentry_sdk.get_client()
+    if not client.is_active() or client.metrics_aggregator is None:
         return None, None, tags
 
     updated_tags = dict(tags or ())  # type: Dict[str, MetricTagValue]
diff --git a/tests/integrations/celery/test_celery.py b/tests/integrations/celery/test_celery.py
index 1f3de09620..117d52c81f 100644
--- a/tests/integrations/celery/test_celery.py
+++ b/tests/integrations/celery/test_celery.py
@@ -6,7 +6,7 @@
 from celery import Celery, VERSION
 from celery.bin import worker
 
-from sentry_sdk import Hub, configure_scope, start_transaction, get_current_span
+from sentry_sdk import configure_scope, start_transaction, get_current_span
 from sentry_sdk.integrations.celery import (
     CeleryIntegration,
     _wrap_apply_async,
@@ -60,9 +60,6 @@ def inner(
             celery.conf.result_backend = "redis://127.0.0.1:6379"
             celery.conf.task_always_eager = False
 
-            Hub.main.bind_client(Hub.current.client)
-            request.addfinalizer(lambda: Hub.main.bind_client(None))
-
             # Once we drop celery 3 we can use the celery_worker fixture
             if VERSION < (5,):
                 worker_fn = worker.worker(app=celery).run
@@ -302,45 +299,6 @@ def dummy_task(x, y):
     assert not events
 
 
-@pytest.mark.skip(
-    reason="This tests for a broken rerun in Celery 3. We don't support Celery 3 anymore."
-)
-def test_broken_prerun(init_celery, connect_signal):
-    from celery.signals import task_prerun
-
-    stack_lengths = []
-
-    def crash(*args, **kwargs):
-        # scope should exist in prerun
-        stack_lengths.append(len(Hub.current._stack))
-        1 / 0
-
-    # Order here is important to reproduce the bug: In Celery 3, a crashing
-    # prerun would prevent other preruns from running.
-
-    connect_signal(task_prerun, crash)
-    celery = init_celery()
-
-    assert len(Hub.current._stack) == 1
-
-    @celery.task(name="dummy_task")
-    def dummy_task(x, y):
-        stack_lengths.append(len(Hub.current._stack))
-        return x / y
-
-    if VERSION >= (4,):
-        dummy_task.delay(2, 2)
-    else:
-        with pytest.raises(ZeroDivisionError):
-            dummy_task.delay(2, 2)
-
-    assert len(Hub.current._stack) == 1
-    if VERSION < (4,):
-        assert stack_lengths == [2]
-    else:
-        assert stack_lengths == [2, 2]
-
-
 @pytest.mark.xfail(
     (4, 2, 0) <= VERSION < (4, 4, 3),
     strict=True,
diff --git a/tests/integrations/conftest.py b/tests/integrations/conftest.py
index 9f30ccf076..560155e2b5 100644
--- a/tests/integrations/conftest.py
+++ b/tests/integrations/conftest.py
@@ -10,6 +10,9 @@ def inner():
         old_capture_event_scope = sentry_sdk.Scope.capture_event
 
         def capture_event_hub(self, event, hint=None, scope=None):
+            """
+            Can be removed when we remove push_scope and the Hub from the SDK.
+            """
             if hint:
                 if "exc_info" in hint:
                     error = hint["exc_info"][1]
diff --git a/tests/test_basics.py b/tests/test_basics.py
index 8727e27f35..5407049417 100644
--- a/tests/test_basics.py
+++ b/tests/test_basics.py
@@ -8,6 +8,7 @@
 
 from tests.conftest import patch_start_tracing_child
 
+import sentry_sdk
 from sentry_sdk import (
     push_scope,
     configure_scope,
@@ -220,7 +221,7 @@ def before_breadcrumb(crumb, hint):
     events = capture_events()
 
     monkeypatch.setattr(
-        Hub.current.client.transport, "record_lost_event", record_lost_event
+        sentry_sdk.get_client().transport, "record_lost_event", record_lost_event
     )
 
     def do_this():
@@ -269,7 +270,7 @@ def test_option_enable_tracing(
     updated_traces_sample_rate,
 ):
     sentry_init(enable_tracing=enable_tracing, traces_sample_rate=traces_sample_rate)
-    options = Hub.current.client.options
+    options = sentry_sdk.get_client().options
     assert has_tracing_enabled(options) is tracing_enabled
     assert options["traces_sample_rate"] == updated_traces_sample_rate
 
@@ -311,6 +312,9 @@ def test_push_scope(sentry_init, capture_events):
 
 
 def test_push_scope_null_client(sentry_init, capture_events):
+    """
+    This test can be removed when we remove push_scope and the Hub from the SDK.
+    """
     sentry_init()
     events = capture_events()
 
@@ -331,6 +335,9 @@ def test_push_scope_null_client(sentry_init, capture_events):
 )
 @pytest.mark.parametrize("null_client", (True, False))
 def test_push_scope_callback(sentry_init, null_client, capture_events):
+    """
+    This test can be removed when we remove push_scope and the Hub from the SDK.
+    """
     sentry_init()
 
     if null_client:
@@ -439,6 +446,9 @@ def test_integration_scoping(sentry_init, capture_events):
     reason="This test is not valid anymore, because with the new Scopes calling bind_client on the Hub sets the client on the global scope. This test should be removed once the Hub is removed"
 )
 def test_client_initialized_within_scope(sentry_init, caplog):
+    """
+    This test can be removed when we remove push_scope and the Hub from the SDK.
+    """
     caplog.set_level(logging.WARNING)
 
     sentry_init()
@@ -455,6 +465,9 @@ def test_client_initialized_within_scope(sentry_init, caplog):
     reason="This test is not valid anymore, because with the new Scopes the push_scope just returns the isolation scope. This test should be removed once the Hub is removed"
 )
 def test_scope_leaks_cleaned_up(sentry_init, caplog):
+    """
+    This test can be removed when we remove push_scope and the Hub from the SDK.
+    """
     caplog.set_level(logging.WARNING)
 
     sentry_init()
@@ -475,6 +488,9 @@ def test_scope_leaks_cleaned_up(sentry_init, caplog):
     reason="This test is not valid anymore, because with the new Scopes there is not pushing and popping of scopes. This test should be removed once the Hub is removed"
 )
 def test_scope_popped_too_soon(sentry_init, caplog):
+    """
+    This test can be removed when we remove push_scope and the Hub from the SDK.
+    """
     caplog.set_level(logging.ERROR)
 
     sentry_init()
@@ -719,7 +735,7 @@ def test_functions_to_trace_with_class(sentry_init, capture_events):
 def test_redis_disabled_when_not_installed(sentry_init):
     sentry_init()
 
-    assert Hub.current.get_integration(RedisIntegration) is None
+    assert sentry_sdk.get_client().get_integration(RedisIntegration) is None
 
 
 def test_multiple_setup_integrations_calls():
diff --git a/tests/test_client.py b/tests/test_client.py
index 0464f32b5e..a2fea56202 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -9,6 +9,7 @@
 
 import pytest
 
+import sentry_sdk
 from sentry_sdk import (
     Hub,
     Client,
@@ -563,7 +564,11 @@ def capture_envelope(self, envelope):
 
 
 def test_configure_scope_available(sentry_init, request, monkeypatch):
-    # Test that scope is configured if client is configured
+    """
+    Test that scope is configured if client is configured
+
+    This test can be removed once configure_scope and the Hub are removed.
+    """
     sentry_init()
 
     with configure_scope() as scope:
@@ -585,7 +590,9 @@ def callback(scope):
 def test_client_debug_option_enabled(sentry_init, caplog):
     sentry_init(debug=True)
 
-    Hub.current._capture_internal_exception((ValueError, ValueError("OK"), None))
+    sentry_sdk.Scope.get_isolation_scope()._capture_internal_exception(
+        (ValueError, ValueError("OK"), None)
+    )
     assert "OK" in caplog.text
 
 
@@ -595,7 +602,9 @@ def test_client_debug_option_disabled(with_client, sentry_init, caplog):
     if with_client:
         sentry_init()
 
-    Hub.current._capture_internal_exception((ValueError, ValueError("OK"), None))
+    sentry_sdk.Scope.get_isolation_scope()._capture_internal_exception(
+        (ValueError, ValueError("OK"), None)
+    )
     assert "OK" not in caplog.text
 
 
@@ -949,7 +958,7 @@ def test_init_string_types(dsn, sentry_init):
     # extra code
     sentry_init(dsn)
     assert (
-        Hub.current.client.dsn
+        sentry_sdk.get_client().dsn
         == "http://894b7d594095440f8dfea9b300e6f572@localhost:8000/2"
     )
 
@@ -1047,7 +1056,7 @@ def test_debug_option(
     else:
         sentry_init(debug=client_option)
 
-    Hub.current._capture_internal_exception(
+    sentry_sdk.Scope.get_isolation_scope()._capture_internal_exception(
         (ValueError, ValueError("something is wrong"), None)
     )
     if debug_output_expected:
diff --git a/tests/test_crons.py b/tests/test_crons.py
index 2b4ed3cab2..493cc44272 100644
--- a/tests/test_crons.py
+++ b/tests/test_crons.py
@@ -4,7 +4,7 @@
 import pytest
 
 import sentry_sdk
-from sentry_sdk import Hub, configure_scope, set_level
+
 from sentry_sdk.crons import capture_checkin
 
 
@@ -322,6 +322,8 @@ def test_scope_data_in_checkin(sentry_init, capture_envelopes):
         # Optional event keys
         "release",
         "environment",
+        "server_name",
+        "sdk",
         # Mandatory check-in specific keys
         "check_in_id",
         "monitor_slug",
@@ -330,42 +332,33 @@ def test_scope_data_in_checkin(sentry_init, capture_envelopes):
         "duration",
         "monitor_config",
         "contexts",  # an event processor adds this
-        # TODO: These fields need to be checked if valid for checkin:
-        "_meta",
-        "tags",
-        "extra",  # an event processor adds this
-        "modules",
-        "server_name",
-        "sdk",
     ]
 
-    hub = Hub.current
-    with configure_scope() as scope:
-        # Add some data to the scope
-        set_level("warning")
-        hub.add_breadcrumb(message="test breadcrumb")
-        scope.set_tag("test_tag", "test_value")
-        scope.set_extra("test_extra", "test_value")
-        scope.set_context("test_context", {"test_key": "test_value"})
+    # Add some data to the scope
+    sentry_sdk.add_breadcrumb(message="test breadcrumb")
+    sentry_sdk.set_context("test_context", {"test_key": "test_value"})
+    sentry_sdk.set_extra("test_extra", "test_value")
+    sentry_sdk.set_level("warning")
+    sentry_sdk.set_tag("test_tag", "test_value")
 
-        capture_checkin(
-            monitor_slug="abc123",
-            check_in_id="112233",
-            status="ok",
-            duration=123,
-        )
+    capture_checkin(
+        monitor_slug="abc123",
+        check_in_id="112233",
+        status="ok",
+        duration=123,
+    )
 
-        (envelope,) = envelopes
-        check_in_event = envelope.items[0].payload.json
+    (envelope,) = envelopes
+    check_in_event = envelope.items[0].payload.json
 
-        invalid_keys = []
-        for key in check_in_event.keys():
-            if key not in valid_keys:
-                invalid_keys.append(key)
+    invalid_keys = []
+    for key in check_in_event.keys():
+        if key not in valid_keys:
+            invalid_keys.append(key)
 
-        assert len(invalid_keys) == 0, "Unexpected keys found in checkin: {}".format(
-            invalid_keys
-        )
+    assert len(invalid_keys) == 0, "Unexpected keys found in checkin: {}".format(
+        invalid_keys
+    )
 
 
 @pytest.mark.asyncio
diff --git a/tests/test_metrics.py b/tests/test_metrics.py
index c0793e8015..a29a18b0cf 100644
--- a/tests/test_metrics.py
+++ b/tests/test_metrics.py
@@ -5,7 +5,8 @@
 
 import pytest
 
-from sentry_sdk import Hub, Scope, metrics, start_transaction
+import sentry_sdk
+from sentry_sdk import Scope, metrics
 from sentry_sdk.tracing import TRANSACTION_SOURCE_ROUTE
 from sentry_sdk.envelope import parse_json
 
@@ -66,7 +67,7 @@ def test_increment(sentry_init, capture_envelopes, maybe_monkeypatched_threading
     metrics.increment("foobar", 1.0, tags={"foo": "bar", "blub": "blah"}, timestamp=ts)
     # python specific alias
     metrics.incr("foobar", 2.0, tags={"foo": "bar", "blub": "blah"}, timestamp=ts)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     statsd_item, meta_item = envelope.items
@@ -119,7 +120,7 @@ def test_timing(sentry_init, capture_envelopes, maybe_monkeypatched_threading):
 
     with metrics.timing("whatever", tags={"blub": "blah"}, timestamp=ts):
         time.sleep(0.1)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     statsd_item, meta_item = envelope.items
@@ -191,7 +192,7 @@ def amazing_nano():
 
     assert amazing() == 42
     assert amazing_nano() == 23
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     statsd_item, meta_item = envelope.items
@@ -278,7 +279,7 @@ def test_timing_basic(sentry_init, capture_envelopes, maybe_monkeypatched_thread
     metrics.timing("timing", 2.0, tags={"a": "b"}, timestamp=ts)
     metrics.timing("timing", 2.0, tags={"a": "b"}, timestamp=ts)
     metrics.timing("timing", 3.0, tags={"a": "b"}, timestamp=ts)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     statsd_item, meta_item = envelope.items
@@ -333,7 +334,7 @@ def test_distribution(sentry_init, capture_envelopes, maybe_monkeypatched_thread
     metrics.distribution("dist", 2.0, tags={"a": "b"}, timestamp=ts)
     metrics.distribution("dist", 2.0, tags={"a": "b"}, timestamp=ts)
     metrics.distribution("dist", 3.0, tags={"a": "b"}, timestamp=ts)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     statsd_item, meta_item = envelope.items
@@ -395,7 +396,7 @@ def test_set(sentry_init, capture_envelopes, maybe_monkeypatched_threading):
     metrics.set("my-set", "peter", tags={"magic": "puff"}, timestamp=ts)
     metrics.set("my-set", "paul", tags={"magic": "puff"}, timestamp=ts)
     metrics.set("my-set", "mary", tags={"magic": "puff"}, timestamp=ts)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     statsd_item, meta_item = envelope.items
@@ -449,7 +450,7 @@ def test_gauge(sentry_init, capture_envelopes, maybe_monkeypatched_threading):
     metrics.gauge("my-gauge", 10.0, tags={"x": "y"}, timestamp=ts)
     metrics.gauge("my-gauge", 20.0, tags={"x": "y"}, timestamp=ts)
     metrics.gauge("my-gauge", 30.0, tags={"x": "y"}, timestamp=ts)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -487,7 +488,7 @@ def test_multiple(sentry_init, capture_envelopes):
         metrics.increment("counter-1", 1.0, timestamp=ts)
     metrics.increment("counter-2", 1.0, timestamp=ts)
 
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -544,7 +545,7 @@ def test_transaction_name(
     metrics.distribution("dist", 2.0, tags={"a": "b"}, timestamp=ts)
     metrics.distribution("dist", 3.0, tags={"a": "b"}, timestamp=ts)
 
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -578,7 +579,7 @@ def test_metric_summaries(
     ts = time.time()
     envelopes = capture_envelopes()
 
-    with start_transaction(
+    with sentry_sdk.start_transaction(
         op="stuff", name="/foo", source=TRANSACTION_SOURCE_ROUTE
     ) as transaction:
         metrics.increment("root-counter", timestamp=ts)
@@ -586,7 +587,7 @@ def test_metric_summaries(
             for x in range(10):
                 metrics.distribution("my-dist", float(x), timestamp=ts)
 
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (transaction, envelope) = envelopes
 
@@ -706,7 +707,7 @@ def test_metric_name_normalization(
 
     metrics.distribution(metric_name, 1.0, unit=metric_unit)
 
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -750,7 +751,7 @@ def test_metric_tag_normalization(
 
     metrics.distribution("a", 1.0, tags=metric_tag)
 
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -797,7 +798,7 @@ def before_emit(key, value, unit, tags):
     metrics.increment("another-removed-metric", 47)
     metrics.increment("yet-another-removed-metric", 1.0, unit="unsupported")
     metrics.increment("actual-metric", 1.0)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -829,10 +830,10 @@ def test_aggregator_flush(
     envelopes = capture_envelopes()
 
     metrics.increment("a-metric", 1.0)
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     assert len(envelopes) == 1
-    assert Hub.current.client.metrics_aggregator.buckets == {}
+    assert sentry_sdk.get_client().metrics_aggregator.buckets == {}
 
 
 @minimum_python_37_with_gevent
@@ -857,7 +858,7 @@ def test_tag_serialization(
             "more-than-one": [1, "zwei", "3.0", None],
         },
     )
-    Hub.current.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
 
@@ -887,7 +888,7 @@ def test_flush_recursion_protection(
         _experiments={"enable_metrics": True},
     )
     envelopes = capture_envelopes()
-    test_client = Hub.current.client
+    test_client = sentry_sdk.get_client()
 
     real_capture_envelope = test_client.transport.capture_envelope
 
@@ -900,8 +901,8 @@ def bad_capture_envelope(*args, **kwargs):
     metrics.increment("counter")
 
     # flush twice to see the inner metric
-    Hub.current.flush()
-    Hub.current.flush()
+    sentry_sdk.flush()
+    sentry_sdk.flush()
 
     (envelope,) = envelopes
     m = parse_metrics(envelope.items[0].payload.get_bytes())
@@ -921,7 +922,7 @@ def test_flush_recursion_protection_background_flush(
         _experiments={"enable_metrics": True},
     )
     envelopes = capture_envelopes()
-    test_client = Hub.current.client
+    test_client = sentry_sdk.get_client()
 
     real_capture_envelope = test_client.transport.capture_envelope
 
@@ -934,7 +935,7 @@ def bad_capture_envelope(*args, **kwargs):
     metrics.increment("counter")
 
     # flush via sleep and flag
-    Hub.current.client.metrics_aggregator._force_flush = True
+    sentry_sdk.get_client().metrics_aggregator._force_flush = True
     time.sleep(0.5)
 
     (envelope,) = envelopes
@@ -963,7 +964,7 @@ def test_disable_metrics_for_old_python_with_gevent(
 
     metrics.incr("counter")
 
-    Hub.current.flush()
+    sentry_sdk.flush()
 
-    assert Hub.current.client.metrics_aggregator is None
+    assert sentry_sdk.get_client().metrics_aggregator is None
     assert not envelopes
diff --git a/tests/test_monitor.py b/tests/test_monitor.py
index 3822437df3..61b71f06bd 100644
--- a/tests/test_monitor.py
+++ b/tests/test_monitor.py
@@ -1,7 +1,7 @@
 import random
 from unittest import mock
 
-from sentry_sdk import Hub, start_transaction
+import sentry_sdk
 from sentry_sdk.transport import Transport
 
 
@@ -24,13 +24,13 @@ def test_no_monitor_if_disabled(sentry_init):
         enable_backpressure_handling=False,
     )
 
-    assert Hub.current.client.monitor is None
+    assert sentry_sdk.get_client().monitor is None
 
 
 def test_monitor_if_enabled(sentry_init):
     sentry_init(transport=HealthyTestTransport())
 
-    monitor = Hub.current.client.monitor
+    monitor = sentry_sdk.get_client().monitor
     assert monitor is not None
     assert monitor._thread is None
 
@@ -43,7 +43,7 @@ def test_monitor_if_enabled(sentry_init):
 def test_monitor_unhealthy(sentry_init):
     sentry_init(transport=UnhealthyTestTransport())
 
-    monitor = Hub.current.client.monitor
+    monitor = sentry_sdk.get_client().monitor
     monitor.interval = 0.1
 
     assert monitor.is_healthy() is True
@@ -64,7 +64,7 @@ def test_transaction_uses_downsampled_rate(
 
     reports = capture_client_reports()
 
-    monitor = Hub.current.client.monitor
+    monitor = sentry_sdk.get_client().monitor
     monitor.interval = 0.1
 
     # make sure rng doesn't sample
@@ -75,7 +75,7 @@ def test_transaction_uses_downsampled_rate(
     assert monitor.is_healthy() is False
     assert monitor.downsample_factor == 1
 
-    with start_transaction(name="foobar") as transaction:
+    with sentry_sdk.start_transaction(name="foobar") as transaction:
         assert transaction.sampled is False
         assert transaction.sample_rate == 0.5
 
@@ -90,7 +90,7 @@ def test_monitor_no_thread_on_shutdown_no_errors(sentry_init):
         "threading.Thread.start",
         side_effect=RuntimeError("can't create new thread at interpreter shutdown"),
     ):
-        monitor = Hub.current.client.monitor
+        monitor = sentry_sdk.get_client().monitor
         assert monitor is not None
         assert monitor._thread is None
         monitor.run()
diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index 91ce9cc58b..989bfeadd1 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -1,7 +1,6 @@
 from unittest import mock
 
 import sentry_sdk
-from sentry_sdk import Hub
 from sentry_sdk.sessions import auto_session_tracking
 
 
@@ -15,17 +14,17 @@ def test_basic(sentry_init, capture_envelopes):
     sentry_init(release="fun-release", environment="not-fun-env")
     envelopes = capture_envelopes()
 
-    hub = Hub.current
-    hub.start_session()
+    sentry_sdk.Scope.get_isolation_scope().start_session()
 
     try:
-        with hub.configure_scope() as scope:
-            scope.set_user({"id": "42"})
-            raise Exception("all is wrong")
+        scope = sentry_sdk.Scope.get_current_scope()
+        scope.set_user({"id": "42"})
+        raise Exception("all is wrong")
     except Exception:
-        hub.capture_exception()
-    hub.end_session()
-    hub.flush()
+        sentry_sdk.capture_exception()
+
+    sentry_sdk.Scope.get_isolation_scope().end_session()
+    sentry_sdk.flush()
 
     assert len(envelopes) == 2
     assert envelopes[0].get_event() is not None
@@ -51,23 +50,20 @@ def test_aggregates(sentry_init, capture_envelopes):
     )
     envelopes = capture_envelopes()
 
-    hub = Hub.current
-
     with auto_session_tracking(session_mode="request"):
         with sentry_sdk.push_scope():
             try:
-                with sentry_sdk.configure_scope() as scope:
-                    scope.set_user({"id": "42"})
-                    raise Exception("all is wrong")
+                scope = sentry_sdk.Scope.get_current_scope()
+                scope.set_user({"id": "42"})
+                raise Exception("all is wrong")
             except Exception:
                 sentry_sdk.capture_exception()
 
     with auto_session_tracking(session_mode="request"):
         pass
 
-    hub.start_session(session_mode="request")
-    hub.end_session()
-
+    sentry_sdk.Scope.get_isolation_scope().start_session(session_mode="request")
+    sentry_sdk.Scope.get_isolation_scope().end_session()
     sentry_sdk.flush()
 
     assert len(envelopes) == 2
@@ -95,8 +91,6 @@ def test_aggregates_explicitly_disabled_session_tracking_request_mode(
     )
     envelopes = capture_envelopes()
 
-    hub = Hub.current
-
     with auto_session_tracking(session_mode="request"):
         with sentry_sdk.push_scope():
             try:
@@ -107,9 +101,8 @@ def test_aggregates_explicitly_disabled_session_tracking_request_mode(
     with auto_session_tracking(session_mode="request"):
         pass
 
-    hub.start_session(session_mode="request")
-    hub.end_session()
-
+    sentry_sdk.Scope.get_isolation_scope().start_session(session_mode="request")
+    sentry_sdk.Scope.get_isolation_scope().end_session()
     sentry_sdk.flush()
 
     sess = envelopes[1]
@@ -128,8 +121,6 @@ def test_no_thread_on_shutdown_no_errors(sentry_init):
         environment="not-fun-env",
     )
 
-    hub = Hub.current
-
     # make it seem like the interpreter is shutting down
     with mock.patch(
         "threading.Thread.start",
@@ -145,7 +136,6 @@ def test_no_thread_on_shutdown_no_errors(sentry_init):
         with auto_session_tracking(session_mode="request"):
             pass
 
-        hub.start_session(session_mode="request")
-        hub.end_session()
-
+        sentry_sdk.Scope.get_isolation_scope().start_session(session_mode="request")
+        sentry_sdk.Scope.get_isolation_scope().end_session()
         sentry_sdk.flush()
diff --git a/tests/test_spotlight.py b/tests/test_spotlight.py
index f0ab4664e0..d00c4eb8fc 100644
--- a/tests/test_spotlight.py
+++ b/tests/test_spotlight.py
@@ -1,13 +1,13 @@
 import pytest
 
-from sentry_sdk import Hub, capture_exception
+import sentry_sdk
 
 
 @pytest.fixture
 def capture_spotlight_envelopes(monkeypatch):
     def inner():
         envelopes = []
-        test_spotlight = Hub.current.client.spotlight
+        test_spotlight = sentry_sdk.get_client().spotlight
         old_capture_envelope = test_spotlight.capture_envelope
 
         def append_envelope(envelope):
@@ -22,13 +22,13 @@ def append_envelope(envelope):
 
 def test_spotlight_off_by_default(sentry_init):
     sentry_init()
-    assert Hub.current.client.spotlight is None
+    assert sentry_sdk.get_client().spotlight is None
 
 
 def test_spotlight_default_url(sentry_init):
     sentry_init(spotlight=True)
 
-    spotlight = Hub.current.client.spotlight
+    spotlight = sentry_sdk.get_client().spotlight
     assert spotlight is not None
     assert spotlight.url == "http://localhost:8969/stream"
 
@@ -36,7 +36,7 @@ def test_spotlight_default_url(sentry_init):
 def test_spotlight_custom_url(sentry_init):
     sentry_init(spotlight="http://foobar@test.com/132")
 
-    spotlight = Hub.current.client.spotlight
+    spotlight = sentry_sdk.get_client().spotlight
     assert spotlight is not None
     assert spotlight.url == "http://foobar@test.com/132"
 
@@ -48,7 +48,7 @@ def test_spotlight_envelope(sentry_init, capture_spotlight_envelopes):
     try:
         raise ValueError("aha!")
     except Exception:
-        capture_exception()
+        sentry_sdk.capture_exception()
 
     (envelope,) = envelopes
     payload = envelope.items[0].payload.json
diff --git a/tests/test_transport.py b/tests/test_transport.py
index 73eee6d353..6cace6f418 100644
--- a/tests/test_transport.py
+++ b/tests/test_transport.py
@@ -11,7 +11,8 @@
 from pytest_localserver.http import WSGIServer
 from werkzeug.wrappers import Request, Response
 
-from sentry_sdk import Hub, Client, add_breadcrumb, capture_message, Scope
+import sentry_sdk
+from sentry_sdk import Client, add_breadcrumb, capture_message, Scope
 from sentry_sdk.envelope import Envelope, Item, parse_json
 from sentry_sdk.transport import KEEP_ALIVE_SOCKET_OPTIONS, _parse_rate_limits
 from sentry_sdk.integrations.logging import LoggingIntegration, ignore_logger
@@ -114,8 +115,8 @@ def test_transport_works(
     if use_pickle:
         client = pickle.loads(pickle.dumps(client))
 
-    Hub.current.bind_client(client)
-    request.addfinalizer(lambda: Hub.current.bind_client(None))
+    sentry_sdk.Scope.get_global_scope().set_client(client)
+    request.addfinalizer(lambda: sentry_sdk.Scope.get_global_scope().set_client(None))
 
     add_breadcrumb(
         level="info", message="i like bread", timestamp=datetime.now(timezone.utc)
@@ -238,7 +239,8 @@ def test_transport_infinite_loop(capturing_server, request, make_client):
     # to an infinite loop
     ignore_logger("werkzeug")
 
-    with Hub(client):
+    sentry_sdk.Scope.get_global_scope().set_client(client)
+    with sentry_sdk.isolation_scope():
         capture_message("hi")
         client.flush()
 
@@ -253,7 +255,8 @@ def test_transport_no_thread_on_shutdown_no_errors(capturing_server, make_client
         "threading.Thread.start",
         side_effect=RuntimeError("can't create new thread at interpreter shutdown"),
     ):
-        with Hub(client):
+        sentry_sdk.Scope.get_global_scope().set_client(client)
+        with sentry_sdk.isolation_scope():
             capture_message("hi")
 
     # nothing exploded but also no events can be sent anymore
diff --git a/tests/test_utils.py b/tests/test_utils.py
index dd3aa3817a..c4064729f8 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -453,7 +453,7 @@ def test_parse_version(version, expected_result):
 @pytest.fixture
 def mock_client_with_dsn_netloc():
     """
-    Returns a mocked hub with a DSN netloc of "abcd1234.ingest.sentry.io".
+    Returns a mocked Client with a DSN netloc of "abcd1234.ingest.sentry.io".
     """
     mock_client = mock.Mock(spec=sentry_sdk.Client)
     mock_client.transport = mock.Mock(spec=sentry_sdk.Transport)
@@ -808,7 +808,7 @@ def test_get_current_thread_meta_gevent_in_thread_failed_to_get_hub():
     def target():
         with mock.patch("sentry_sdk.utils.is_gevent", side_effect=[True]):
             with mock.patch(
-                "sentry_sdk.utils.get_gevent_hub", side_effect=["fake hub"]
+                "sentry_sdk.utils.get_gevent_hub", side_effect=["fake gevent hub"]
             ):
                 job = gevent.spawn(get_current_thread_meta)
                 job.join()
diff --git a/tests/tracing/test_integration_tests.py b/tests/tracing/test_integration_tests.py
index 9543014cac..4752c9a131 100644
--- a/tests/tracing/test_integration_tests.py
+++ b/tests/tracing/test_integration_tests.py
@@ -6,7 +6,6 @@
 
 from sentry_sdk import (
     capture_message,
-    Hub,
     Scope,
     start_span,
     start_transaction,
@@ -65,7 +64,9 @@ def test_continue_from_headers(sentry_init, capture_envelopes, sampled, sample_r
     with start_transaction(name="hi", sampled=True if sample_rate == 0 else None):
         with start_span() as old_span:
             old_span.sampled = sampled
-            headers = dict(Hub.current.iter_trace_propagation_headers(old_span))
+            headers = dict(
+                Scope.get_current_scope().iter_trace_propagation_headers(old_span)
+            )
             headers["baggage"] = (
                 "other-vendor-value-1=foo;bar;baz, "
                 "sentry-trace_id=771a43a4192642f0b136d5159a501700, "
@@ -269,7 +270,7 @@ def test_trace_propagation_meta_head_sdk(sentry_init):
     with start_transaction(transaction):
         with start_span(op="foo", description="foodesc") as current_span:
             span = current_span
-            meta = Hub.current.trace_propagation_meta()
+            meta = Scope.get_current_scope().trace_propagation_meta()
 
     ind = meta.find(">") + 1
     sentry_trace, baggage = meta[:ind], meta[ind:]
diff --git a/tests/tracing/test_misc.py b/tests/tracing/test_misc.py
index e1006ef1bb..6d722e992f 100644
--- a/tests/tracing/test_misc.py
+++ b/tests/tracing/test_misc.py
@@ -6,7 +6,7 @@
 from unittest.mock import MagicMock
 
 import sentry_sdk
-from sentry_sdk import Hub, Scope, start_span, start_transaction, set_measurement
+from sentry_sdk import Scope, start_span, start_transaction, set_measurement
 from sentry_sdk.consts import MATCH_ALL
 from sentry_sdk.tracing import Span, Transaction
 from sentry_sdk.tracing_utils import should_propagate_trace
@@ -84,7 +84,7 @@ def test_finds_transaction_on_scope(sentry_init):
 
     transaction = start_transaction(name="dogpark")
 
-    scope = Hub.current.scope
+    scope = Scope.get_current_scope()
 
     # See note in Scope class re: getters and setters of the `transaction`
     # property. For the moment, assigning to scope.transaction merely sets the
@@ -113,7 +113,7 @@ def test_finds_transaction_when_descendent_span_is_on_scope(
     transaction = start_transaction(name="dogpark")
     child_span = transaction.start_child(op="sniffing")
 
-    scope = Hub.current.scope
+    scope = Scope.get_current_scope()
     scope._span = child_span
 
     # this is the same whether it's the transaction itself or one of its
@@ -136,7 +136,7 @@ def test_finds_orphan_span_on_scope(sentry_init):
 
     span = start_span(op="sniffing")
 
-    scope = Hub.current.scope
+    scope = Scope.get_current_scope()
     scope._span = span
 
     assert scope._span is not None
@@ -150,7 +150,7 @@ def test_finds_non_orphan_span_on_scope(sentry_init):
     transaction = start_transaction(name="dogpark")
     child_span = transaction.start_child(op="sniffing")
 
-    scope = Hub.current.scope
+    scope = Scope.get_current_scope()
     scope._span = child_span
 
     assert scope._span is not None
diff --git a/tests/tracing/test_sampling.py b/tests/tracing/test_sampling.py
index 1940656bdf..88fb048d57 100644
--- a/tests/tracing/test_sampling.py
+++ b/tests/tracing/test_sampling.py
@@ -3,7 +3,8 @@
 
 import pytest
 
-from sentry_sdk import Hub, Scope, start_span, start_transaction, capture_exception
+import sentry_sdk
+from sentry_sdk import Scope, start_span, start_transaction, capture_exception
 from sentry_sdk.tracing import Transaction
 from sentry_sdk.utils import logger
 
@@ -278,7 +279,7 @@ def record_lost_event(reason, data_category=None, item=None):
     sentry_init(traces_sample_rate=traces_sample_rate)
 
     monkeypatch.setattr(
-        Hub.current.client.transport, "record_lost_event", record_lost_event
+        sentry_sdk.get_client().transport, "record_lost_event", record_lost_event
     )
 
     transaction = start_transaction(name="dogpark")
@@ -307,7 +308,7 @@ def record_lost_event(reason, data_category=None, item=None):
     sentry_init(traces_sampler=traces_sampler)
 
     monkeypatch.setattr(
-        Hub.current.client.transport, "record_lost_event", record_lost_event
+        sentry_sdk.get_client().transport, "record_lost_event", record_lost_event
     )
 
     transaction = start_transaction(name="dogpark")