diff --git a/.travis.yml b/.travis.yml
index 7635499..f9fa957 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,8 +17,16 @@ matrix:
     - php: 7.2
     - php: 7.3
     - php: 7.4
+    - name: "Windows"
+      os: windows
+      language: shell # no built-in php support
+      before_install:
+        - choco install php
+        - choco install composer
+        - export PATH="$(powershell -Command '("Process", "Machine" | % { [Environment]::GetEnvironmentVariable("PATH", $_) -Split ";" -Replace "\\$", "" } | Select -Unique | % { cygpath $_ }) -Join ":"')"
     - php: hhvm-3.18
   allow_failures:
+    - os: windows
     - php: hhvm-3.18
 
 install:
diff --git a/examples/gunzip.php b/examples/gunzip.php
index a140572..98b70bf 100644
--- a/examples/gunzip.php
+++ b/examples/gunzip.php
@@ -2,6 +2,11 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
+if (DIRECTORY_SEPARATOR === '\\') {
+    fwrite(STDERR, 'Non-blocking console I/O not supported on Windows' . PHP_EOL);
+    exit(1);
+}
+
 if (!defined('ZLIB_ENCODING_GZIP')) {
     fwrite(STDERR, 'Requires PHP 5.4+ with ext-zlib enabled' . PHP_EOL);
     exit(1);
diff --git a/examples/gzip.php b/examples/gzip.php
index 901b72f..f09c464 100644
--- a/examples/gzip.php
+++ b/examples/gzip.php
@@ -2,6 +2,11 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
+if (DIRECTORY_SEPARATOR === '\\') {
+    fwrite(STDERR, 'Non-blocking console I/O not supported on Windows' . PHP_EOL);
+    exit(1);
+}
+
 if (!defined('ZLIB_ENCODING_GZIP')) {
     fwrite(STDERR, 'Requires PHP 5.4+ with ext-zlib enabled' . PHP_EOL);
     exit(1);
diff --git a/tests/FunctionalExamplesTest.php b/tests/FunctionalExamplesTest.php
index bce7652..41eaa08 100644
--- a/tests/FunctionalExamplesTest.php
+++ b/tests/FunctionalExamplesTest.php
@@ -4,7 +4,12 @@ class FunctionalExamplesTest extends TestCase
 {
     public function setUp()
     {
-        if (defined('HHVM_VERSION')) $this->markTestSkipped('Not supported on HHVM (ignores window size / encoding format)');
+        if (DIRECTORY_SEPARATOR === '\\') {
+            $this->markTestSkipped('Non-blocking console I/O not supported on Windows');
+        }
+        if (defined('HHVM_VERSION')) {
+            $this->markTestSkipped('Not supported on HHVM (ignores window size / encoding format)');
+        }
     }
     public function testChain()
     {
diff --git a/tests/ZlibFilterGzipCompressorTest.php b/tests/ZlibFilterGzipCompressorTest.php
index 8a86a27..e1817f0 100644
--- a/tests/ZlibFilterGzipCompressorTest.php
+++ b/tests/ZlibFilterGzipCompressorTest.php
@@ -15,7 +15,7 @@ public function setUp()
 
     public function testCompressEmpty()
     {
-        $os = "\x03"; // UNIX (0x03) or UNKNOWN (0xFF)
+        $os = DIRECTORY_SEPARATOR === '\\' ? "\x0a" : "\x03"; // NTFS(0x0a) or UNIX (0x03)
         $this->compressor->on('data', $this->expectCallableOnceWith("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00" . $os . "\x03\x00" . "\x00\x00\x00\x00\x00\x00\x00\x00"));
         $this->compressor->on('end', $this->expectCallableOnce());