diff --git a/.bazelrc b/.bazelrc
index b3a24e860..f8ab84961 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -1 +1,2 @@
 common --experimental_enable_bzlmod
+build --incompatible_default_to_explicit_init_py=true
diff --git a/MODULE.bazel.lock b/MODULE.bazel.lock
index a994967e1..3f0134571 100644
--- a/MODULE.bazel.lock
+++ b/MODULE.bazel.lock
@@ -1938,7 +1938,7 @@
         "recordedFileInputs": {
           "@@//requirements_dev.txt": "e334b7dcc42e151776e78441d8a21ca6b2cf78644e3441832b0f1134a6b5aeef",
           "@@trlc~//requirements.txt": "b9318249d997255dc8b9f944f861ed8bf5ade7000888bc898efa8c3af978c29b",
-          "@@//requirements.txt": "0446ff5d71d47a121bd24f0cf0f0215af8d9a336492416c77c8612423052196f"
+          "@@//requirements.txt": "0a6607a4f1ff835158750ed1b5865d747af1f237e3fe99ad8f32d6d18c285c5a"
         },
         "recordedDirentsInputs": {},
         "envVariables": {},
@@ -2018,6 +2018,30 @@
               "group_deps": []
             }
           },
+          "lobster_dependencies_311_yamale": {
+            "bzlFile": "@@rules_python~//python/pip_install:pip_repository.bzl",
+            "ruleClassName": "whl_library",
+            "attributes": {
+              "requirement": "yamale>=6.0.0",
+              "repo": "lobster_dependencies_311",
+              "repo_prefix": "lobster_dependencies_311_",
+              "whl_patches": {},
+              "experimental_target_platforms": [],
+              "python_interpreter": "",
+              "python_interpreter_target": "@@rules_python~~python~python_3_11_host//:python",
+              "quiet": true,
+              "timeout": 600,
+              "isolated": true,
+              "extra_pip_args": [],
+              "download_only": false,
+              "pip_data_exclude": [],
+              "enable_implicit_namespace_pkgs": false,
+              "environment": {},
+              "envsubst": [],
+              "group_name": "",
+              "group_deps": []
+            }
+          },
           "lobster_dev_dependencies_311_flask": {
             "bzlFile": "@@rules_python~//python/pip_install:pip_repository.bzl",
             "ruleClassName": "whl_library",
@@ -2311,6 +2335,9 @@
                 ],
                 "trlc": [
                   "3.11"
+                ],
+                "yamale": [
+                  "3.11"
                 ]
               },
               "default_version": "3.11"
diff --git a/tests_unit/BUILD b/tests_unit/BUILD
new file mode 100644
index 000000000..0c0f08940
--- /dev/null
+++ b/tests_unit/BUILD
@@ -0,0 +1,54 @@
+test_suite(
+    name = "tests_unit",
+    tests = [
+        ":test_file_tag_generator",
+        ":test_io",
+        ":test_io_signal_duplicate_items",
+        ":test_items",
+        ":test_location",
+        ":test_meta_data_tool_base",
+        ":test_tool",
+    ],
+)
+
+py_test(
+    name = "test_file_tag_generator",
+    srcs = ["test_file_tag_generator.py"],
+    deps = ["//:lobster"],
+)
+
+py_test(
+    name = "test_io",
+    srcs = ["test_io.py"],
+    deps = ["//:lobster"],
+)
+
+py_test(
+    name = "test_io_signal_duplicate_items",
+    srcs = ["test_io_signal_duplicate_items.py"],
+    deps = ["//:lobster"],
+)
+
+py_test(
+    name = "test_items",
+    srcs = ["test_items.py"],
+    deps = ["//:lobster"],
+)
+
+py_test(
+    name = "test_location",
+    srcs = ["test_location.py"],
+    deps = ["//:lobster"],
+)
+
+py_test(
+    name = "test_meta_data_tool_base",
+    srcs = ["test_meta_data_tool_base.py"],
+    deps = ["//:lobster"],
+)
+
+py_test(
+    name = "test_tool",
+    srcs = ["test_tool.py"],
+    deps = ["//:lobster"],
+)