diff --git a/pyproject.toml b/pyproject.toml
index 68c5c2a3..0dc108f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,9 +88,10 @@ workspace.members = [
 path = "ahriman-core/src/ahriman/__init__.py"
 
 [tool.uv.sources]
-ahriman-core = { workspace = true }
-ahriman-triggers = { workspace = true }
-ahriman-web = { workspace = true }
+ahriman-core = { workspace = true, editable = false }
+ahriman-pytest-plugins = { path = "tools/pytest_plugins", editable = true }
+ahriman-triggers = { workspace = true, editable = false }
+ahriman-web = { workspace = true, editable = false }
 
 [tool.uv.workspace]
 members = [
diff --git a/tox.toml b/tox.toml
index 35cc9ff2..ec77c98f 100644
--- a/tox.toml
+++ b/tox.toml
@@ -3,6 +3,9 @@ env_list = [
     "tests",
 ]
 isolated_build = true
+requires = [
+    "tox-uv",
+]
 labels.release = [
     "version",
     "docs",
@@ -337,7 +340,9 @@ deps = [
     { replace = "ref", of = ["project", "extras"], extend = true },
     "./tools/pytest_plugins",
 ]
+package = "uv"
 pip_pre = true
+runner = "uv-venv-runner"
 set_env.CFLAGS = "-Wno-unterminated-string-initialization"
 commands = [
     [