diff --git a/.github/workflows/ci-macos.yml b/.github/workflows/ci-macos.yml
index 1501f8c..1e8b1c4 100644
--- a/.github/workflows/ci-macos.yml
+++ b/.github/workflows/ci-macos.yml
@@ -35,4 +35,4 @@ jobs:
 
       - run: mix compile --warnings-as-errors
 
-      - run: mix test
+      - run: mix test --only os_macos
diff --git a/.github/workflows/ci-ubuntu.yml b/.github/workflows/ci-ubuntu.yml
index 86c582d..976136e 100644
--- a/.github/workflows/ci-ubuntu.yml
+++ b/.github/workflows/ci-ubuntu.yml
@@ -55,4 +55,4 @@ jobs:
       - run: mix compile --warnings-as-errors
         if: ${{ matrix.lint }}
 
-      - run: mix test
+      - run: mix test --only os_linux
diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index 1aa38bc..a14cede 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -44,4 +44,4 @@ jobs:
       - run: mix compile --warnings-as-errors
         if: ${{ matrix.lint }}
 
-      - run: mix test
+      - run: mix test --only os_windows
diff --git a/test/backends/fs_inotify_linux_test.exs b/test/backends/fs_inotify_linux_test.exs
new file mode 100644
index 0000000..6408132
--- /dev/null
+++ b/test/backends/fs_inotify_linux_test.exs
@@ -0,0 +1,110 @@
+defmodule FileSystem.Backends.FSInotifyLinuxTest do
+  use ExUnit.Case, async: true
+  import FileSystem.Backends.FSInotify
+
+  @moduletag os_inux: true
+
+  describe "options parse test" do
+    test "supported options" do
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                ~c"-r",
+                ~c"/tmp"
+              ]} ==
+               parse_options(dirs: ["/tmp"], recursive: true)
+
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                ~c"/tmp"
+              ]} ==
+               parse_options(dirs: ["/tmp"], recursive: false)
+    end
+
+    test "ignore unsupported options" do
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                ~c"/tmp"
+              ]} ==
+               parse_options(dirs: ["/tmp"], recursive: false, unsupported: :options)
+
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                ~c"-r",
+                ~c"/tmp"
+              ]} ==
+               parse_options(dirs: ["/tmp"], recursive: :unknown_value)
+    end
+  end
+end
diff --git a/test/backends/fs_inotify_test.exs b/test/backends/fs_inotify_test.exs
index 87b44f2..f2f6daf 100644
--- a/test/backends/fs_inotify_test.exs
+++ b/test/backends/fs_inotify_test.exs
@@ -2,113 +2,13 @@ defmodule FileSystem.Backends.FSInotifyTest do
   use ExUnit.Case, async: true
   import FileSystem.Backends.FSInotify
 
+  @moduletag os_inux: true, os_windows: true
+
   describe "options parse test" do
     test "without :dirs" do
       assert {:error, _} = parse_options([])
       assert {:error, _} = parse_options(recursive: 1)
     end
-
-    test "supported options" do
-      assert {:ok,
-              [
-                ~c"-e",
-                ~c"modify",
-                ~c"-e",
-                ~c"close_write",
-                ~c"-e",
-                ~c"moved_to",
-                ~c"-e",
-                ~c"moved_from",
-                ~c"-e",
-                ~c"create",
-                ~c"-e",
-                ~c"delete",
-                ~c"-e",
-                ~c"attrib",
-                ~c"--format",
-                [37, 119, 1, 37, 101, 1, 37, 102],
-                ~c"--quiet",
-                ~c"-m",
-                ~c"-r",
-                ~c"/tmp"
-              ]} ==
-               parse_options(dirs: ["/tmp"], recursive: true)
-
-      assert {:ok,
-              [
-                ~c"-e",
-                ~c"modify",
-                ~c"-e",
-                ~c"close_write",
-                ~c"-e",
-                ~c"moved_to",
-                ~c"-e",
-                ~c"moved_from",
-                ~c"-e",
-                ~c"create",
-                ~c"-e",
-                ~c"delete",
-                ~c"-e",
-                ~c"attrib",
-                ~c"--format",
-                [37, 119, 1, 37, 101, 1, 37, 102],
-                ~c"--quiet",
-                ~c"-m",
-                ~c"/tmp"
-              ]} ==
-               parse_options(dirs: ["/tmp"], recursive: false)
-    end
-
-    test "ignore unsupported options" do
-      assert {:ok,
-              [
-                ~c"-e",
-                ~c"modify",
-                ~c"-e",
-                ~c"close_write",
-                ~c"-e",
-                ~c"moved_to",
-                ~c"-e",
-                ~c"moved_from",
-                ~c"-e",
-                ~c"create",
-                ~c"-e",
-                ~c"delete",
-                ~c"-e",
-                ~c"attrib",
-                ~c"--format",
-                [37, 119, 1, 37, 101, 1, 37, 102],
-                ~c"--quiet",
-                ~c"-m",
-                ~c"/tmp"
-              ]} ==
-               parse_options(dirs: ["/tmp"], recursive: false, unsupported: :options)
-
-      assert {:ok,
-              [
-                ~c"-e",
-                ~c"modify",
-                ~c"-e",
-                ~c"close_write",
-                ~c"-e",
-                ~c"moved_to",
-                ~c"-e",
-                ~c"moved_from",
-                ~c"-e",
-                ~c"create",
-                ~c"-e",
-                ~c"delete",
-                ~c"-e",
-                ~c"attrib",
-                ~c"--format",
-                [37, 119, 1, 37, 101, 1, 37, 102],
-                ~c"--quiet",
-                ~c"-m",
-                ~c"-r",
-                ~c"/tmp"
-              ]} ==
-               parse_options(dirs: ["/tmp"], recursive: :unknown_value)
-    end
   end
 
   describe "port line parse test" do
diff --git a/test/backends/fs_inotify_windows_test.exs b/test/backends/fs_inotify_windows_test.exs
new file mode 100644
index 0000000..2eb7735
--- /dev/null
+++ b/test/backends/fs_inotify_windows_test.exs
@@ -0,0 +1,114 @@
+defmodule FileSystem.Backends.FSInotifyWindowsTest do
+  use ExUnit.Case, async: true
+  import FileSystem.Backends.FSInotify
+
+  @moduletag os_windows: true
+
+  describe "options parse test" do
+    test "supported options" do
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                ~c"-r",
+                tmp_dir
+              ]} = parse_options(dirs: ["/tmp"], recursive: true)
+
+      assert tmp_dir |> to_string() |> String.ends_with?("/tmp")
+
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                tmp_dir
+              ]} = parse_options(dirs: ["/tmp"], recursive: false)
+
+      assert tmp_dir |> to_string() |> String.ends_with?("/tmp")
+    end
+
+    test "ignore unsupported options" do
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                tmp_dir
+              ]} = parse_options(dirs: ["/tmp"], recursive: false, unsupported: :options)
+
+      assert tmp_dir |> to_string() |> String.ends_with?("/tmp")
+
+      assert {:ok,
+              [
+                ~c"-e",
+                ~c"modify",
+                ~c"-e",
+                ~c"close_write",
+                ~c"-e",
+                ~c"moved_to",
+                ~c"-e",
+                ~c"moved_from",
+                ~c"-e",
+                ~c"create",
+                ~c"-e",
+                ~c"delete",
+                ~c"-e",
+                ~c"attrib",
+                ~c"--format",
+                [37, 119, 1, 37, 101, 1, 37, 102],
+                ~c"--quiet",
+                ~c"-m",
+                ~c"-r",
+                tmp_dir
+              ]} = parse_options(dirs: ["/tmp"], recursive: :unknown_value)
+
+      assert tmp_dir |> to_string() |> String.ends_with?("/tmp")
+    end
+  end
+end
diff --git a/test/backends/fs_mac_test.exs b/test/backends/fs_mac_test.exs
index 0a64d66..f1fbd0a 100644
--- a/test/backends/fs_mac_test.exs
+++ b/test/backends/fs_mac_test.exs
@@ -2,6 +2,8 @@ defmodule FileSystem.Backends.FSMacTest do
   use ExUnit.Case, async: true
   import FileSystem.Backends.FSMac
 
+  @moduletag os_macos: true
+
   describe "options parse test" do
     test "without :dirs" do
       assert {:error, _} = parse_options([])
diff --git a/test/backends/fs_poll_test.exs b/test/backends/fs_poll_test.exs
index 39c1f23..b38e6bc 100644
--- a/test/backends/fs_poll_test.exs
+++ b/test/backends/fs_poll_test.exs
@@ -2,6 +2,8 @@ defmodule FileSystem.Backends.FSPollTest do
   use ExUnit.Case, async: true
   import FileSystem.Backends.FSPoll
 
+  @moduletag os_linux: true, os_macos: true, os_windows: true
+
   @mtime1 {{2017, 11, 13}, {10, 14, 00}}
   @mtime2 {{2017, 11, 13}, {10, 15, 00}}
 
diff --git a/test/file_system_test.exs b/test/file_system_test.exs
index 7b59b6d..69823f1 100644
--- a/test/file_system_test.exs
+++ b/test/file_system_test.exs
@@ -1,6 +1,8 @@
 defmodule FileSystemTest do
   use ExUnit.Case, async: true
 
+  @moduletag os_linux: true, os_macos: true, os_windows: true
+
   test "file event api" do
     tmp_dir = System.cmd("mktemp", ["-d"]) |> elem(0) |> String.trim()
     {:ok, pid} = FileSystem.start_link(dirs: [tmp_dir])