Fix our test fixture requirements

pyproject.toml

@@ -23,3 +23,10 @@ test = [
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 testpaths = ["tests"]
+
+[dependency-groups]
+dev = [
+    "httpx>=0.28.1",
+    "pytest>=9.0.2",
+    "pytest-asyncio>=1.3.0",
+]

uv.lock

@@ -724,6 +724,13 @@ test = [
     { name = "pytest-asyncio" },
 ]
 
+[package.dev-dependencies]
+dev = [
+    { name = "httpx" },
+    { name = "pytest" },
+    { name = "pytest-asyncio" },
+]
+
 [package.metadata]
 requires-dist = [
     { name = "aiosqlite", specifier = ">=0.19.0" },
@@ -738,6 +745,13 @@ requires-dist = [
 ]
 provides-extras = ["test"]
 
+[package.metadata.requires-dev]
+dev = [
+    { name = "httpx", specifier = ">=0.28.1" },
+    { name = "pytest", specifier = ">=9.0.2" },
+    { name = "pytest-asyncio", specifier = ">=1.3.0" },
+]
+
 [[package]]
 name = "starlette"
 version = "0.50.0"