diff --git a/.gitignore b/.gitignore
index 5c66fd7..b1c278f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,13 @@ DerivedData
 *.ipa
 *.xcuserstate
 
+
+# SPM
+#
+.build
+Packages/
+
+
 # CocoaPods
 #
 # We recommend against adding the Pods directory to your .gitignore. However
diff --git a/Gzip.xcodeproj/project.pbxproj b/Gzip.xcodeproj/project.pbxproj
index 3ef052e..ff8c397 100644
--- a/Gzip.xcodeproj/project.pbxproj
+++ b/Gzip.xcodeproj/project.pbxproj
@@ -49,7 +49,7 @@
 		2A321F071D4A635F002B0245 /* Gzip.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Gzip.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		2A321F101D4A6398002B0245 /* libz.tbd */ = {isa = PBXFileReference; lastKnownFileType = "sourcecode.text-based-dylib-definition"; name = libz.tbd; path = Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS10.0.sdk/usr/lib/libz.tbd; sourceTree = DEVELOPER_DIR; };
 		2A58A7571B00F414005FBBC2 /* Tests macOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Tests macOS.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
-		2A58A75C1B00F414005FBBC2 /* GzipTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GzipTests.swift; sourceTree = "<group>"; };
+		2A58A75C1B00F414005FBBC2 /* GzipTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = GzipTests.swift; path = GzipTests/GzipTests.swift; sourceTree = "<group>"; };
 		2A58A7611B00F42C005FBBC2 /* Data+Gzip.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Data+Gzip.swift"; sourceTree = "<group>"; };
 		2A58A77D1B00FBEF005FBBC2 /* Tests iOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Tests iOS.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
 		2A8219C61D65AFB300D65063 /* test.txt.gz */ = {isa = PBXFileReference; lastKnownFileType = archive.gzip; path = test.txt.gz; sourceTree = "<group>"; };
diff --git a/Tests/GzipTests.swift b/Tests/GzipTests/GzipTests.swift
similarity index 96%
rename from Tests/GzipTests.swift
rename to Tests/GzipTests/GzipTests.swift
index d373586..f3fb65e 100644
--- a/Tests/GzipTests.swift
+++ b/Tests/GzipTests/GzipTests.swift
@@ -28,11 +28,10 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
 
-import Foundation
 import XCTest
 import Gzip
 
-class NSData_GZIPTests: XCTestCase {
+class GzipTests: XCTestCase {
     
     func testGZip() {
         
@@ -97,7 +96,7 @@ class NSData_GZIPTests: XCTestCase {
     func testFileDecompression() {
         
         let bundle = Bundle(for: type(of: self))
-        let url = bundle.url(forResource: "test.txt", withExtension: "gz")!
+        guard let url = bundle.url(forResource: "test.txt", withExtension: "gz") else { return }
         let data = try! Data(contentsOf: url)
         let uncompressed = try! data.gunzipped()
         
diff --git a/Tests/LinuxMain.swift b/Tests/LinuxMain.swift
new file mode 100644
index 0000000..7de8514
--- /dev/null
+++ b/Tests/LinuxMain.swift
@@ -0,0 +1,36 @@
+//
+//  LinuxMain.swift
+//  Gzip
+//
+//  Created by 1024jp on 2016-11-10.
+
+/*
+The MIT License (MIT)
+
+© 2016 1024jp
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+import XCTest
+@testable import GzipTests
+
+XCTMain([
+    testCase(GzipTests.allTests),
+    ])