diff --git a/jax/_src/internal_test_util/test_harnesses.py b/jax/_src/internal_test_util/test_harnesses.py
index cd65b702f..c8b8d203a 100644
--- a/jax/_src/internal_test_util/test_harnesses.py
+++ b/jax/_src/internal_test_util/test_harnesses.py
@@ -62,6 +62,9 @@ from jax._src.lax import windowed_reductions as lax_windowed_reductions
 from jax._src.lib import xla_client
 from jax._src import random as jax_random
 
+# mypy generates a lot of false positive due to re-assigned variables.
+# mypy: disable-error-code="assignment, no-redef"
+
 # The code in this file relies on the values of some flags that are defined by
 # jtu. Note that the following can not always be moved to a test file since
 # then the test file has to import jtu first (to define the flags) which is not
@@ -172,9 +175,9 @@ class Harness:
     self.group_name = jtu.sanitize_test_name(group_name)
     self.name = jtu.sanitize_test_name(name)
     self.fullname = self.name if self.group_name is None else f"{self.group_name}_{self.name}"
-    self.fun = fun  # type: ignore[assignment]
+    self.fun = fun
     self.arg_descriptors = arg_descriptors
-    self.rng_factory = rng_factory  # type: ignore[assignment]
+    self.rng_factory = rng_factory
     self.jax_unimplemented = jax_unimplemented
     self.dtype = dtype
     self.params = params
@@ -2060,18 +2063,17 @@ def _make_slice_harness(name,
   define(
       lax.slice_p,
       f"{name}_a={jtu.format_shape_dtype_string(shape, dtype)}_{start_indices=}_{limit_indices=}_{strides=}",
-      # type: ignore
       lax.slice,
       [
-          RandArg(shape, dtype),  # type: ignore
-          StaticArg(start_indices),  # type: ignore
-          StaticArg(limit_indices),  # type: ignore
+          RandArg(shape, dtype),
+          StaticArg(start_indices),
+          StaticArg(limit_indices),
           StaticArg(strides)
-      ],  # type: ignore
+      ],
       dtype=dtype,
-      shape=shape,  # type: ignore
-      start_indices=start_indices,  # type: ignore
-      limit_indices=limit_indices)  # type: ignore
+      shape=shape,
+      start_indices=start_indices,
+      limit_indices=limit_indices)
 
 
 # Test first all dtypes
@@ -2161,17 +2163,16 @@ def _make_dynamic_slice_harness(name,
     define(
         lax.dynamic_slice_p,
         f"{name}_a={jtu.format_shape_dtype_string(shape, dtype)}_{start_indices=}_{limit_indices=}_enablexla={enable_xla}",
-        # type: ignore
         lax.dynamic_slice,
         [
-            RandArg(shape, dtype),  # type: ignore
+            RandArg(shape, dtype),
             np.array(list(start_indices)),
             StaticArg(tuple(map(operator.sub, limit_indices, start_indices)))
-        ],  # type: ignore
+        ],
         dtype=dtype,
-        shape=shape,  # type: ignore
-        start_indices=start_indices,  # type: ignore
-        limit_indices=limit_indices,  # type: ignore
+        shape=shape,
+        start_indices=start_indices,
+        limit_indices=limit_indices,
         enable_xla=enable_xla)
 
 
@@ -2218,19 +2219,19 @@ def _make_dynamic_update_slice_harness(name,
     define(
         lax.dynamic_update_slice_p,
         (
-            f"{name}_operand={jtu.format_shape_dtype_string(shape, dtype)}"  # type: ignore
+            f"{name}_operand={jtu.format_shape_dtype_string(shape, dtype)}"
             f"_update={jtu.format_shape_dtype_string(update_shape, dtype)}"
             f"_{start_indices=}_{enable_xla=}"),
         lax.dynamic_update_slice,
         [
-            RandArg(shape, dtype),  # type: ignore
-            RandArg(update_shape, dtype),  # type: ignore
+            RandArg(shape, dtype),
+            RandArg(update_shape, dtype),
             np.array(start_indices)
-        ],  # type: ignore
+        ],
         dtype=dtype,
-        shape=shape,  # type: ignore
-        start_indices=start_indices,  # type: ignore
-        update_shape=update_shape,  # type: ignore
+        shape=shape,
+        start_indices=start_indices,
+        update_shape=update_shape,
         enable_xla=enable_xla)
 
 
@@ -2261,12 +2262,12 @@ def _make_squeeze_harness(name,
                           dtype=np.float32):
   define(
       lax.squeeze_p,
-      f"{name}_inshape={jtu.format_shape_dtype_string(shape, dtype)}_{dimensions=}",  # type: ignore
+      f"{name}_inshape={jtu.format_shape_dtype_string(shape, dtype)}_{dimensions=}",
       lax.squeeze,
-      [RandArg(shape, dtype), StaticArg(dimensions)],  # type: ignore[has-type]
+      [RandArg(shape, dtype), StaticArg(dimensions)],
       dtype=dtype,
       arg_shape=shape,
-      dimensions=dimensions)  # type: ignore[has-type]
+      dimensions=dimensions)
 
 
 # Test first all dtypes
@@ -3312,6 +3313,7 @@ for padding, lhs_dilation, rhs_dilation in [
         lhs_dilation=lhs_dilation,
         rhs_dilation=rhs_dilation)
 
+key_types: list[tuple[tuple[int, ...], jax.typing.DTypeLike]]
 key_types = [((4,), np.uint32)]
 if config.enable_x64.value:
   key_types.append(((2,), np.uint64))
diff --git a/pyproject.toml b/pyproject.toml
index 8132c8773..630f25835 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,14 +44,6 @@ module = [
 ]
 ignore_missing_imports = true
 
-[[tool.mypy.overrides]]
-module = [
-    "jax.interpreters.autospmd",
-    "jax.lax.lax_parallel",
-    "jax._src.internal_test_util.test_harnesses",
-]
-ignore_errors = true
-
 [tool.pytest.ini_options]
 markers = [
     "multiaccelerator: indicates that a test can make use of and possibly requires multiple accelerators",