diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 000000000..ff2c165e2
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,2 @@
+/.github/CODEOWNERS @neo4j/drivers
+/.github/workflows/ @neo4j/drivers
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
new file mode 100644
index 000000000..f85fb9212
--- /dev/null
+++ b/.github/workflows/tests.yaml
@@ -0,0 +1,57 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - '5.0'
+  pull_request:
+    branches:
+      - '5.0'
+
+jobs:
+  win-unit-tests:
+    name: Windows Unit Tests
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        python-version:
+          - semver: '3.7'
+            tox-factor: 'py37'
+          - semver: '3.8'
+            tox-factor: 'py38'
+          - semver: '3.9'
+            tox-factor: 'py39'
+          - semver: '3.10'
+            tox-factor: 'py310'
+          - semver: '3.11'
+            tox-factor: 'py311'
+          - semver: '3.12'
+            tox-factor: 'py312'
+          - semver: '3.13'
+            tox-factor: 'py313'
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5.0.0
+
+      - name: Set up Python ${{ matrix.python-version.semver }}
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c  # v6.0.0
+        with:
+          python-version: ${{ matrix.python-version.semver }}
+          cache: 'pip'
+      - name: Install tox
+        run: python -m pip install -U tox>=4.8.0
+      - name: Run unit tests
+        run: python -m tox -vv -f unit ${{ matrix.python-version.tox-factor }}
+
+  gha-conclusion:
+    name: gha-conclusion
+    needs: win-unit-tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Signal failure
+        if: ${{ cancelled() || contains(needs.*.result, 'cancelled') || contains(needs.*.result, 'failure') }}
+        run: |
+          echo "Some workflows have failed!"
+          exit 1
+      - name: Signal success
+        if: ${{ !cancelled() && !contains(needs.*.result, 'cancelled') && !contains(needs.*.result, 'failure') }}
+        run: echo "All done!"
diff --git a/src/neo4j/_codec/hydration/v1/temporal.py b/src/neo4j/_codec/hydration/v1/temporal.py
index 9f6e943b1..937b2435c 100644
--- a/src/neo4j/_codec/hydration/v1/temporal.py
+++ b/src/neo4j/_codec/hydration/v1/temporal.py
@@ -216,7 +216,7 @@ def dehydrate_np_datetime(value):
         """
         if np.isnat(value):
             return None
-        year = value.astype("datetime64[Y]").astype(int) + 1970
+        year = value.astype("datetime64[Y]").astype(np.int64) + 1970
         if not 0 < year <= 9999:
             # while we could encode years outside the range, they would fail
             # when retrieved from the database.
@@ -224,9 +224,10 @@ def dehydrate_np_datetime(value):
                 f"Year out of range ({MIN_YEAR:d}..{MAX_YEAR:d}) "
                 f"found {year}"
             )
-        seconds = value.astype(np.dtype("datetime64[s]")).astype(int)
+        seconds = value.astype(np.dtype("datetime64[s]")).astype(np.int64)
         nanoseconds = (
-            value.astype(np.dtype("datetime64[ns]")).astype(int) % NANO_SECONDS
+            value.astype(np.dtype("datetime64[ns]")).astype(np.int64)
+            % NANO_SECONDS
         )
         return Structure(b"d", seconds, nanoseconds)
 
@@ -299,6 +300,7 @@ def dehydrate_timedelta(value):
 
 
 if np is not None:
+    _NUMPY_DURATION_NS_FALLBACK = object()
     _NUMPY_DURATION_UNITS = {
         "Y": "years",
         "M": "months",
@@ -310,6 +312,9 @@ def dehydrate_timedelta(value):
         "ms": "milliseconds",
         "us": "microseconds",
         "ns": "nanoseconds",
+        "ps": _NUMPY_DURATION_NS_FALLBACK,
+        "fs": _NUMPY_DURATION_NS_FALLBACK,
+        "as": _NUMPY_DURATION_NS_FALLBACK,
     }
 
     def dehydrate_np_timedelta(value):
@@ -323,14 +328,17 @@ def dehydrate_np_timedelta(value):
         if np.isnat(value):
             return None
         unit, step_size = np.datetime_data(value)
-        numer = int(value.astype(int))
-        # raise RuntimeError((type(numer), type(step_size)))
-        kwarg = _NUMPY_DURATION_UNITS.get(unit)
-        if kwarg is not None:
-            return dehydrate_duration(Duration(**{kwarg: numer * step_size}))
-        return dehydrate_duration(
-            Duration(nanoseconds=value.astype("timedelta64[ns]").astype(int))
-        )
+        numer = int(value.astype(np.int64))
+        try:
+            kwarg = _NUMPY_DURATION_UNITS[unit]
+        except KeyError:
+            raise TypeError(
+                f"Unsupported numpy.timedelta64 unit: {unit!r}"
+            ) from None
+        if kwarg is _NUMPY_DURATION_NS_FALLBACK:
+            nanoseconds = value.astype("timedelta64[ns]").astype(np.int64)
+            return dehydrate_duration(Duration(nanoseconds=nanoseconds))
+        return dehydrate_duration(Duration(**{kwarg: numer * step_size}))
 
 
 if pd is not None:
diff --git a/tests/unit/async_/io/test_neo4j_pool.py b/tests/unit/async_/io/test_neo4j_pool.py
index e1549fd06..3924689e1 100644
--- a/tests/unit/async_/io/test_neo4j_pool.py
+++ b/tests/unit/async_/io/test_neo4j_pool.py
@@ -15,6 +15,7 @@
 
 
 import inspect
+import time
 
 import pytest
 
@@ -28,6 +29,7 @@
     AsyncBolt,
     AsyncNeo4jPool,
 )
+from neo4j._async_compat import async_sleep
 from neo4j._async_compat.util import AsyncUtil
 from neo4j._conf import (
     RoutingConfig,
@@ -45,6 +47,8 @@
 from ...._async_compat import mark_async_test
 
 
+MONOTONIC_TIME_RESOLUTION = time.get_clock_info("monotonic").resolution
+
 ROUTER1_ADDRESS = ResolvedAddress(("1.2.3.1", 9000), host_name="host")
 ROUTER2_ADDRESS = ResolvedAddress(("1.2.3.1", 9001), host_name="host")
 ROUTER3_ADDRESS = ResolvedAddress(("1.2.3.1", 9002), host_name="host")
@@ -193,6 +197,8 @@ async def test_acquires_new_routing_table_if_stale(
     old_value = pool.routing_tables[db.name].last_updated_time
     pool.routing_tables[db.name].ttl = 0
 
+    await async_sleep(MONOTONIC_TIME_RESOLUTION * 2)
+
     cx = await pool.acquire(READ_ACCESS, 30, db, None, None, None)
     await pool.release(cx)
     assert pool.routing_tables[db.name].last_updated_time > old_value
@@ -214,6 +220,8 @@ async def test_removes_old_routing_table(opener):
     db2_rt = pool.routing_tables[TEST_DB2.name]
     db2_rt.ttl = -RoutingConfig.routing_table_purge_delay
 
+    await async_sleep(MONOTONIC_TIME_RESOLUTION * 2)
+
     cx = await pool.acquire(READ_ACCESS, 30, TEST_DB1, None, None, None)
     await pool.release(cx)
     assert pool.routing_tables[TEST_DB1.name].last_updated_time > old_value
diff --git a/tests/unit/async_/test_addressing.py b/tests/unit/async_/test_addressing.py
index 5a0a940b5..7c76724be 100644
--- a/tests/unit/async_/test_addressing.py
+++ b/tests/unit/async_/test_addressing.py
@@ -53,8 +53,12 @@ async def test_address_resolve_with_custom_resolver_none() -> None:
 @pytest.mark.parametrize(
     ("test_input", "expected"),
     [
+        (Address(("example.invalid", "7687")), ValueError),
+        (Address(("example.invalid", 7687)), ValueError),
+        (Address(("example.invalid", None)), ValueError),
         (Address(("127.0.0.1", "abcd")), ValueError),
         (Address((None, None)), ValueError),
+        (Address((1234, "7687")), TypeError),
     ],
 )
 @mark_async_test
@@ -67,6 +71,21 @@ async def test_address_resolve_with_unresolvable_address(
         )
 
 
+@pytest.mark.parametrize(
+    "test_input",
+    [
+        Address((None, 7687)),
+        Address(("example.com", None)),
+    ],
+)
+@mark_async_test
+async def test_address_resolves_with_none(test_input) -> None:
+    resolved = await AsyncUtil.list(
+        AsyncNetworkUtil.resolve_address(test_input, resolver=None)
+    )
+    assert resolved
+
+
 @mark_async_test
 @pytest.mark.parametrize("resolver_type", ("sync", "async"))
 async def test_address_resolve_with_custom_resolver(resolver_type) -> None:
diff --git a/tests/unit/common/codec/packstream/v1/test_packstream.py b/tests/unit/common/codec/packstream/v1/test_packstream.py
index 324b2c0d3..3b70d3bcc 100644
--- a/tests/unit/common/codec/packstream/v1/test_packstream.py
+++ b/tests/unit/common/codec/packstream/v1/test_packstream.py
@@ -15,6 +15,7 @@
 
 
 import struct
+import sys
 from io import BytesIO
 from math import (
     isnan,
@@ -37,6 +38,11 @@
 
 standard_ascii = [chr(i) for i in range(128)]
 not_ascii = "♥O◘♦♥O◘♦"
+SKIP_PANDAS_INT_AS_INT64 = (
+    pd.Series([], dtype=int).dtype.itemsize < 8
+    and sys.version_info < (3, 9)
+    and sys.platform == "win32"
+)
 
 
 @pytest.fixture
@@ -289,7 +295,13 @@ def test_positive_int64(self, int_type, assert_packable):
     @pytest.mark.parametrize(
         "dtype",
         (
-            int,
+            pytest.param(
+                int,
+                marks=pytest.mark.skipif(
+                    SKIP_PANDAS_INT_AS_INT64,
+                    reason="Legacy pandas treating int as int32",
+                ),
+            ),
             pd.Int64Dtype(),
             pd.UInt64Dtype(),
             np.int64,
@@ -317,7 +329,13 @@ def test_negative_int64(self, int_type, assert_packable):
     @pytest.mark.parametrize(
         "dtype",
         (
-            int,
+            pytest.param(
+                int,
+                marks=pytest.mark.skipif(
+                    SKIP_PANDAS_INT_AS_INT64,
+                    reason="Legacy pandas treating int as int32",
+                ),
+            ),
             pd.Int64Dtype(),
             np.int64,
             np.longlong,
diff --git a/tests/unit/sync/io/test_neo4j_pool.py b/tests/unit/sync/io/test_neo4j_pool.py
index 13b9be4e2..30fc908f6 100644
--- a/tests/unit/sync/io/test_neo4j_pool.py
+++ b/tests/unit/sync/io/test_neo4j_pool.py
@@ -15,6 +15,7 @@
 
 
 import inspect
+import time
 
 import pytest
 
@@ -22,6 +23,7 @@
     READ_ACCESS,
     WRITE_ACCESS,
 )
+from neo4j._async_compat import sleep
 from neo4j._async_compat.util import Util
 from neo4j._conf import (
     RoutingConfig,
@@ -45,6 +47,8 @@
 from ...._async_compat import mark_sync_test
 
 
+MONOTONIC_TIME_RESOLUTION = time.get_clock_info("monotonic").resolution
+
 ROUTER1_ADDRESS = ResolvedAddress(("1.2.3.1", 9000), host_name="host")
 ROUTER2_ADDRESS = ResolvedAddress(("1.2.3.1", 9001), host_name="host")
 ROUTER3_ADDRESS = ResolvedAddress(("1.2.3.1", 9002), host_name="host")
@@ -193,6 +197,8 @@ def test_acquires_new_routing_table_if_stale(
     old_value = pool.routing_tables[db.name].last_updated_time
     pool.routing_tables[db.name].ttl = 0
 
+    sleep(MONOTONIC_TIME_RESOLUTION * 2)
+
     cx = pool.acquire(READ_ACCESS, 30, db, None, None, None)
     pool.release(cx)
     assert pool.routing_tables[db.name].last_updated_time > old_value
@@ -214,6 +220,8 @@ def test_removes_old_routing_table(opener):
     db2_rt = pool.routing_tables[TEST_DB2.name]
     db2_rt.ttl = -RoutingConfig.routing_table_purge_delay
 
+    sleep(MONOTONIC_TIME_RESOLUTION * 2)
+
     cx = pool.acquire(READ_ACCESS, 30, TEST_DB1, None, None, None)
     pool.release(cx)
     assert pool.routing_tables[TEST_DB1.name].last_updated_time > old_value
diff --git a/tests/unit/sync/test_addressing.py b/tests/unit/sync/test_addressing.py
index fc741716e..3f48247be 100644
--- a/tests/unit/sync/test_addressing.py
+++ b/tests/unit/sync/test_addressing.py
@@ -53,8 +53,12 @@ def test_address_resolve_with_custom_resolver_none() -> None:
 @pytest.mark.parametrize(
     ("test_input", "expected"),
     [
+        (Address(("example.invalid", "7687")), ValueError),
+        (Address(("example.invalid", 7687)), ValueError),
+        (Address(("example.invalid", None)), ValueError),
         (Address(("127.0.0.1", "abcd")), ValueError),
         (Address((None, None)), ValueError),
+        (Address((1234, "7687")), TypeError),
     ],
 )
 @mark_sync_test
@@ -67,6 +71,21 @@ def test_address_resolve_with_unresolvable_address(
         )
 
 
+@pytest.mark.parametrize(
+    "test_input",
+    [
+        Address((None, 7687)),
+        Address(("example.com", None)),
+    ],
+)
+@mark_sync_test
+def test_address_resolves_with_none(test_input) -> None:
+    resolved = Util.list(
+        NetworkUtil.resolve_address(test_input, resolver=None)
+    )
+    assert resolved
+
+
 @mark_sync_test
 @pytest.mark.parametrize("resolver_type", ("sync", "async"))
 def test_address_resolve_with_custom_resolver(resolver_type) -> None: