diff --git a/brut.apktool/apktool-lib/src/test/java/brut/androlib/UnknownCompressionTest.java b/brut.apktool/apktool-lib/src/test/java/brut/androlib/UnknownCompressionTest.java
new file mode 100644
index 00000000..f7d1875e
--- /dev/null
+++ b/brut.apktool/apktool-lib/src/test/java/brut/androlib/UnknownCompressionTest.java
@@ -0,0 +1,95 @@
+/**
+ *  Copyright 2014 Ryszard Wiśniewski <brut.alll@gmail.com>
+ *  Copyright 2016 Connor Tumbleson <connor.tumbleson@gmail.com>
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package brut.androlib;
+
+import brut.androlib.res.util.ExtFile;
+import brut.common.BrutException;
+import brut.util.OS;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.logging.Logger;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotSame;
+
+/**
+ * @author Connor Tumbleson <connor.tumbleson@gmail.com>
+ */
+public class UnknownCompressionTest {
+
+    @BeforeClass
+    public static void beforeClass() throws Exception, BrutException {
+        TestUtils.cleanFrameworkFile();
+        sTmpDir = new ExtFile(OS.createTempDirectory());
+        TestUtils.copyResourceDir(LargeIntsInManifestTest.class, "brut/apktool/unknown_compression/", sTmpDir);
+
+        String apk = "deflated_unknowns.apk";
+        ApkOptions apkOptions = new ApkOptions();
+        apkOptions.frameworkFolderLocation = sTmpDir.getAbsolutePath();
+
+        sOriginalFile = new ExtFile(sTmpDir, apk);
+
+        // decode deflated_unknowns.apk
+        ApkDecoder apkDecoder = new ApkDecoder(sOriginalFile);
+        apkDecoder.setOutDir(new File(sOriginalFile.getAbsolutePath() + ".out"));
+        apkDecoder.decode();
+
+        // build deflated_unknowns
+        ExtFile clientApkFolder = new ExtFile(sOriginalFile.getAbsolutePath() + ".out");
+        new Androlib(apkOptions).build(clientApkFolder, null);
+        sBuiltFile = new ExtFile(clientApkFolder, "dist" + File.separator + apk);
+
+    }
+
+    @AfterClass
+    public static void afterClass() throws BrutException {
+        OS.rmdir(sTmpDir);
+    }
+
+    @Test
+    public void pkmExtensionDeflatedTest() throws BrutException, IOException {
+        Integer control = sOriginalFile.getDirectory().getCompressionLevel("assets/bin/Data/test.pkm");
+        Integer rebuilt = sBuiltFile.getDirectory().getCompressionLevel("assets/bin/Data/test.pkm");
+
+        // Check that control = rebuilt (both deflated)
+        // Add extra check for checking not equal to 0, just in case control gets broken
+        assertEquals(control, rebuilt);
+        assertNotSame(0, rebuilt);
+    }
+
+    @Test
+    public void doubleExtensionStoredTest() throws BrutException, IOException {
+        Integer control = sOriginalFile.getDirectory().getCompressionLevel("assets/bin/Data/two.extension.file");
+        Integer rebuilt = sBuiltFile.getDirectory().getCompressionLevel("assets/bin/Data/two.extension.file");
+
+        // Check that control = rebuilt (both stored)
+        // Add extra check for checking = 0 to enforce check for stored just in case control breaks
+        assertEquals(control, rebuilt);
+        assertEquals(new Integer(0), rebuilt);
+    }
+
+    private static ExtFile sTmpDir;
+
+    private static ExtFile sOriginalFile;
+    private static ExtFile sBuiltFile;
+
+    private final static Logger LOGGER = Logger.getLogger(BuildAndDecodeJarTest.class.getName());
+}
\ No newline at end of file
diff --git a/brut.apktool/apktool-lib/src/test/resources/brut/apktool/unknown_compression/deflated_unknowns.apk b/brut.apktool/apktool-lib/src/test/resources/brut/apktool/unknown_compression/deflated_unknowns.apk
new file mode 100644
index 00000000..2ec5db2d
Binary files /dev/null and b/brut.apktool/apktool-lib/src/test/resources/brut/apktool/unknown_compression/deflated_unknowns.apk differ