diff --git a/examples/chatgpt_example.py b/examples/chatgpt_example.py
index 709942d..dc00b39 100644
--- a/examples/chatgpt_example.py
+++ b/examples/chatgpt_example.py
@@ -100,9 +100,7 @@
 
         # Simulate feedback: short completions get a thumbs down.
         feedback_type = (
-            FeedbackType.THUMBS_UP
-            if len(completion) > 40
-            else FeedbackType.THUMBS_DOWN
+            FeedbackType.THUMBS_UP if len(completion) > 40 else FeedbackType.THUMBS_DOWN
         )
         handle.track_feedback(inference_id, feedback_type)
 
diff --git a/tests/conftest.py b/tests/conftest.py
index a97bcb3..fce8f2e 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,5 @@
 """Shared fixtures for the WildEdge SDK test suite."""
 
-import sys
 from types import SimpleNamespace
 from unittest.mock import MagicMock, patch
 
@@ -10,12 +9,6 @@
 from wildedge.device import DeviceInfo
 from wildedge.model import ModelInfo
 
-requires_linux = pytest.mark.skipif(sys.platform != "linux", reason="linux-only test")
-requires_macos = pytest.mark.skipif(sys.platform != "darwin", reason="macos-only test")
-requires_windows = pytest.mark.skipif(
-    sys.platform != "win32", reason="windows-only test"
-)
-
 
 @pytest.fixture
 def device_info():
diff --git a/tests/test_platform_adapters.py b/tests/test_platform_adapters.py
index 5af6286..168e98d 100644
--- a/tests/test_platform_adapters.py
+++ b/tests/test_platform_adapters.py
@@ -1,7 +1,5 @@
 from __future__ import annotations
 
-import pytest
-
 from wildedge.platforms.base import cuda_device_count
 from wildedge.platforms.linux import LinuxPlatform
 from wildedge.platforms.macos import MacOSPlatform
@@ -9,7 +7,6 @@
 from wildedge.platforms.windows import WindowsPlatform
 
 
-@pytest.mark.requires_linux
 def test_linux_gpu_accelerators_cuda_and_rocm_counts(monkeypatch):
     platform = LinuxPlatform()
     monkeypatch.setattr("wildedge.platforms.linux.cuda_device_count", lambda _: 1)
@@ -20,7 +17,6 @@ def test_linux_gpu_accelerators_cuda_and_rocm_counts(monkeypatch):
     assert gpu_name == "A100"
 
 
-@pytest.mark.requires_windows
 def test_windows_gpu_accelerators_uses_device_count(monkeypatch):
     platform = WindowsPlatform()
     monkeypatch.setattr("wildedge.platforms.windows.cuda_device_count", lambda _: 0)
@@ -29,7 +25,6 @@ def test_windows_gpu_accelerators_uses_device_count(monkeypatch):
     assert gpu_name is None
 
 
-@pytest.mark.requires_macos
 def test_macos_gpu_accelerators_for_arm64(monkeypatch):
     platform = MacOSPlatform()
     monkeypatch.setattr("platform.machine", lambda: "arm64")
@@ -70,6 +65,57 @@ def cuInit(self, _flags):  # noqa: N802
     assert cuda_device_count("libcuda.so.1") == 0
 
 
+def test_macos_os_version_returns_mac_ver(monkeypatch):
+    monkeypatch.setattr("platform.mac_ver", lambda: ("15.3.0", ("", "", ""), ""))
+    assert MacOSPlatform().os_version() == "15.3.0"
+
+
+def test_macos_os_version_returns_none_on_empty(monkeypatch):
+    monkeypatch.setattr("platform.mac_ver", lambda: ("", ("", "", ""), ""))
+    assert MacOSPlatform().os_version() is None
+
+
+def test_linux_os_version_reads_os_release(monkeypatch, tmp_path):
+    os_release = tmp_path / "os-release"
+    os_release.write_text(
+        'ID=ubuntu\nPRETTY_NAME="Ubuntu 22.04.3 LTS"\nVERSION_ID="22.04"\n'
+    )
+    monkeypatch.setattr(
+        "wildedge.platforms.linux.Path",
+        lambda p: (
+            os_release if p == "/etc/os-release" else __import__("pathlib").Path(p)
+        ),
+    )
+    assert LinuxPlatform().os_version() == "Ubuntu 22.04.3 LTS"
+
+
+def test_linux_os_version_falls_back_to_platform_version(monkeypatch, tmp_path):
+    missing = tmp_path / "no-os-release"
+    monkeypatch.setattr(
+        "wildedge.platforms.linux.Path",
+        lambda p: missing if p == "/etc/os-release" else __import__("pathlib").Path(p),
+    )
+    monkeypatch.setattr(
+        "wildedge.platforms.linux.platform.version",
+        lambda: "#1 SMP Fri Jan 1 00:00:00 UTC 2021",
+    )
+    assert LinuxPlatform().os_version() == "#1 SMP Fri Jan 1 00:00:00 UTC 2021"
+
+
+def test_windows_os_version_returns_platform_version(monkeypatch):
+    monkeypatch.setattr(
+        "wildedge.platforms.windows.platform.version", lambda: "10.0.22621"
+    )
+    assert WindowsPlatform().os_version() == "10.0.22621"
+
+
+def test_unknown_os_version_returns_platform_version(monkeypatch):
+    monkeypatch.setattr(
+        "wildedge.platforms.unknown.platform.version", lambda: "some-kernel-version"
+    )
+    assert UnknownPlatform().os_version() == "some-kernel-version"
+
+
 def test_platform_adapters_expose_state_and_cache_paths():
     for adapter in (
         LinuxPlatform(),
diff --git a/wildedge/device.py b/wildedge/device.py
index ed9b372..a5e2519 100644
--- a/wildedge/device.py
+++ b/wildedge/device.py
@@ -156,7 +156,7 @@ def detect_device(
         device_id=device_id,
         device_type=CURRENT_PLATFORM.wire_type,
         device_model=CURRENT_PLATFORM.device_model(),
-        os_version=platform.version(),
+        os_version=CURRENT_PLATFORM.os_version(),
         locale=detect_locale(),
         timezone=detect_timezone(),
         cpu_arch=platform.machine() or None,
diff --git a/wildedge/platforms/base.py b/wildedge/platforms/base.py
index 28b060d..692ca9d 100644
--- a/wildedge/platforms/base.py
+++ b/wildedge/platforms/base.py
@@ -16,6 +16,8 @@ def cache_base(self) -> Path: ...
 
     def device_model(self) -> str | None: ...
 
+    def os_version(self) -> str | None: ...
+
     def ram_bytes(self) -> int | None: ...
 
     def disk_bytes(self) -> int | None: ...
diff --git a/wildedge/platforms/linux.py b/wildedge/platforms/linux.py
index 59a4834..95c4daf 100644
--- a/wildedge/platforms/linux.py
+++ b/wildedge/platforms/linux.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import os
+import platform
 import shutil
 from pathlib import Path
 
@@ -37,6 +38,20 @@ def device_model(self) -> str | None:
                 debug_detection_failure(f"linux device_model ({path})", exc)
         return None
 
+    def os_version(self) -> str | None:
+        try:
+            path = Path("/etc/os-release")
+            if path.exists():
+                for line in path.read_text().splitlines():
+                    if line.startswith("PRETTY_NAME="):
+                        return line.split("=", 1)[1].strip().strip('"') or None
+        except Exception as exc:
+            debug_detection_failure("linux os_version", exc)
+        try:
+            return platform.version() or None
+        except Exception:
+            return None
+
     def ram_bytes(self) -> int | None:
         try:
             with open("/proc/meminfo") as f:
diff --git a/wildedge/platforms/macos.py b/wildedge/platforms/macos.py
index 2d0313d..6949cc1 100644
--- a/wildedge/platforms/macos.py
+++ b/wildedge/platforms/macos.py
@@ -53,6 +53,14 @@ def disk_bytes(self) -> int | None:
             debug_detection_failure("macos disk_bytes", exc)
             return None
 
+    def os_version(self) -> str | None:
+        try:
+            ver = platform.mac_ver()[0]
+            return ver or None
+        except Exception as exc:
+            debug_detection_failure("macos os_version", exc)
+            return None
+
     def gpu_accelerators(self) -> tuple[list[str], str | None]:
         if platform.machine() == "arm64":
             return ["mps"], None
diff --git a/wildedge/platforms/unknown.py b/wildedge/platforms/unknown.py
index ddaa489..dc72a36 100644
--- a/wildedge/platforms/unknown.py
+++ b/wildedge/platforms/unknown.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import platform
 import shutil
 import sys
 from pathlib import Path
@@ -22,6 +23,13 @@ def cache_base(self) -> Path:
     def device_model(self) -> str | None:
         return None
 
+    def os_version(self) -> str | None:
+        try:
+            return platform.version() or None
+        except Exception as exc:
+            debug_detection_failure("unknown os_version", exc)
+            return None
+
     def ram_bytes(self) -> int | None:
         return None
 
diff --git a/wildedge/platforms/windows.py b/wildedge/platforms/windows.py
index 902bf01..aabce70 100644
--- a/wildedge/platforms/windows.py
+++ b/wildedge/platforms/windows.py
@@ -2,6 +2,7 @@
 
 import ctypes
 import os
+import platform
 import shutil
 from pathlib import Path
 
@@ -44,6 +45,13 @@ def device_model(self) -> str | None:
             debug_detection_failure("windows device_model", exc)
             return None
 
+    def os_version(self) -> str | None:
+        try:
+            return platform.version() or None
+        except Exception as exc:
+            debug_detection_failure("windows os_version", exc)
+            return None
+
     def ram_bytes(self) -> int | None:
         try: