diff --git a/tests/isolation_provider/test_container.py b/tests/isolation_provider/test_container.py
index 860cf9f..48f8d68 100644
--- a/tests/isolation_provider/test_container.py
+++ b/tests/isolation_provider/test_container.py
@@ -21,31 +21,6 @@ def provider() -> Container:
     return Container()
 
 
-class ContainerWait(Container):
-    """Container isolation provider that blocks until the container has started."""
-
-    def exec_container(self, *args, **kwargs):  # type: ignore [no-untyped-def]
-        # Check every 100ms if a container with the expected name has showed up.
-        # Else, closing the file descriptors may not work.
-        name = kwargs["name"]
-        runtime = self.get_runtime()
-        p = super().exec_container(*args, **kwargs)
-        for i in range(50):
-            containers = subprocess.run(
-                [runtime, "ps"], capture_output=True
-            ).stdout.decode()
-            if name in containers:
-                return p
-            time.sleep(0.1)
-
-        raise RuntimeError(f"Container {name} did not start within 5 seconds")
-
-
-@pytest.fixture
-def provider_wait() -> ContainerWait:
-    return ContainerWait()
-
-
 class TestContainer(IsolationProviderTest):
     pass
 
diff --git a/tests/isolation_provider/test_dummy.py b/tests/isolation_provider/test_dummy.py
index 1002687..198a6af 100644
--- a/tests/isolation_provider/test_dummy.py
+++ b/tests/isolation_provider/test_dummy.py
@@ -1,11 +1,9 @@
 import os
-import subprocess
 
 import pytest
 from pytest_mock import MockerFixture
 
 from dangerzone.conversion import errors
-from dangerzone.document import Document
 from dangerzone.isolation_provider.base import IsolationProvider
 from dangerzone.isolation_provider.dummy import Dummy
 
@@ -16,24 +14,6 @@ if not os.environ.get("DUMMY_CONVERSION", False):
     pytest.skip("Dummy conversion is not enabled", allow_module_level=True)
 
 
-class DummyWait(Dummy):
-    """Dummy isolation provider that spawns a blocking process."""
-
-    def start_doc_to_pixels_proc(self, document: Document) -> subprocess.Popen:
-        return subprocess.Popen(
-            ["python3"],
-            stdin=subprocess.PIPE,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-            start_new_session=True,
-        )
-
-
-@pytest.fixture
-def provider_wait() -> DummyWait:
-    return DummyWait()
-
-
 @pytest.fixture
 def provider() -> Dummy:
     return Dummy()
@@ -42,21 +22,12 @@ def provider() -> Dummy:
 class TestDummyTermination(IsolationProviderTermination):
     def test_failed(
         self,
-        provider_wait: IsolationProvider,
+        provider: IsolationProvider,
         mocker: MockerFixture,
     ) -> None:
         mocker.patch.object(
-            provider_wait,
+            provider,
             "get_proc_exception",
             return_value=errors.DocFormatUnsupported(),
         )
-        super().test_failed(provider_wait, mocker)
-
-    def test_linger_unkillable(
-        self,
-        provider_wait: IsolationProvider,
-        mocker: MockerFixture,
-    ) -> None:
-        # We have to spawn a blocking process here, else we can't imitate an
-        # "unkillable" process.
-        super().test_linger_unkillable(provider_wait, mocker)
+        super().test_failed(provider, mocker)
diff --git a/tests/isolation_provider/test_qubes.py b/tests/isolation_provider/test_qubes.py
index e3b0b28..d011a65 100644
--- a/tests/isolation_provider/test_qubes.py
+++ b/tests/isolation_provider/test_qubes.py
@@ -20,11 +20,6 @@ elif os.environ.get("DUMMY_CONVERSION", False):
     pytest.skip("Dummy conversion is enabled", allow_module_level=True)
 
 
-@pytest.fixture
-def provider() -> Qubes:
-    return Qubes()
-
-
 class QubesWait(Qubes):
     """Qubes isolation provider that blocks until the disposable qube has started."""
 
@@ -53,7 +48,7 @@ class QubesWait(Qubes):
 
 
 @pytest.fixture
-def provider_wait() -> QubesWait:
+def provider() -> QubesWait:
     return QubesWait()