diff --git a/javase/src/test/java/com/google/zxing/client/j2se/Base64DecoderTestCase.java b/javase/src/test/java/com/google/zxing/client/j2se/Base64DecoderTestCase.java
new file mode 100644
index 000000000..8b286fbb9
--- /dev/null
+++ b/javase/src/test/java/com/google/zxing/client/j2se/Base64DecoderTestCase.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2017 ZXing authors
+ *
+ * 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 com.google.zxing.client.j2se;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.nio.charset.StandardCharsets;
+
+public final class Base64DecoderTestCase extends Assert {
+  
+  @Test
+  public void testEncode() {
+    Base64Decoder decoder = Base64Decoder.getInstance();
+    assertArrayEquals("foo".getBytes(StandardCharsets.UTF_8), decoder.decode("Zm9v"));
+  }
+  
+}
diff --git a/javase/src/test/java/com/google/zxing/client/j2se/ImageReaderTestCase.java b/javase/src/test/java/com/google/zxing/client/j2se/ImageReaderTestCase.java
new file mode 100644
index 000000000..029e170db
--- /dev/null
+++ b/javase/src/test/java/com/google/zxing/client/j2se/ImageReaderTestCase.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 ZXing authors
+ *
+ * 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 com.google.zxing.client.j2se;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.awt.image.BufferedImage;
+import java.net.URI;
+
+public final class ImageReaderTestCase extends Assert {
+  
+  @Test
+  public void testFoo() throws Exception {
+    String uri = 
+        "data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSKudfOulrSOp3WOyDZu6QdvCchPGolfO0o/XBs/fNwfjZ0frl3/zy7////w" +
+        "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAkAABAALAAAAAAQABAAAAVVICSOZGlCQAosJ6" +
+        "mu7fiyZeKqNKToQGDsM8hBADgUXoGAiqhSvp5QAnQKGIgUhwFUYLCVDFCrKUE1lBavAViFIDlTImbKC5Gm2hB0SlBCBMQiB0UjIQA7";
+    BufferedImage image = ImageReader.readImage(new URI(uri));
+    assertEquals(16, image.getWidth());
+    assertEquals(16, image.getHeight());
+  }
+  
+}
diff --git a/zxingorg/pom.xml b/zxingorg/pom.xml
index 05c91d097..66bb42762 100644
--- a/zxingorg/pom.xml
+++ b/zxingorg/pom.xml
@@ -40,6 +40,11 @@
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
     </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <parent>
diff --git a/zxingorg/src/test/java/com/google/zxing/web/OutputUtilsTestCase.java b/zxingorg/src/test/java/com/google/zxing/web/OutputUtilsTestCase.java
new file mode 100644
index 000000000..ade772d74
--- /dev/null
+++ b/zxingorg/src/test/java/com/google/zxing/web/OutputUtilsTestCase.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2017 ZXing authors
+ *
+ * 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 com.google.zxing.web;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public final class OutputUtilsTestCase extends Assert {
+  
+  @Test
+  public void testOutput() {
+    byte[] array = new byte[] { 0, 1, -1, 127, -128, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
+    assertEquals(
+        "00 01 ff 7f 80 02 03 04   05 06 07 08 09 0a 0b 0c\n", 
+        OutputUtils.arrayToString(array));
+  }
+  
+}