diff --git a/core/test/src/com/google/zxing/common/reedsolomon/ReedSolomonEncoderQRCodeTestCase.java b/core/test/src/com/google/zxing/common/reedsolomon/ReedSolomonEncoderQRCodeTestCase.java
index 17f6d37a3..2ed1856d7 100644
--- a/core/test/src/com/google/zxing/common/reedsolomon/ReedSolomonEncoderQRCodeTestCase.java
+++ b/core/test/src/com/google/zxing/common/reedsolomon/ReedSolomonEncoderQRCodeTestCase.java
@@ -45,7 +45,7 @@ public final class ReedSolomonEncoderQRCodeTestCase extends AbstractReedSolomonT
     ReedSolomonEncoder encoder = new ReedSolomonEncoder(GenericGF.QR_CODE_FIELD_256);
     ReedSolomonDecoder decoder = new ReedSolomonDecoder(GenericGF.QR_CODE_FIELD_256);
     for (int i = 0; i < 100; i++) {
-      int size = 1 + random.nextInt(1000);
+      int size = 2 + random.nextInt(254);
       int[] toEncode = new int[size];
       int ecBytes = 1 + random.nextInt(2 * (1 + size / 8));
       ecBytes = Math.min(ecBytes, size - 1);
@@ -56,6 +56,7 @@ public final class ReedSolomonEncoderQRCodeTestCase extends AbstractReedSolomonT
       int[] original = new int[dataBytes];
       System.arraycopy(toEncode, 0, original, 0, dataBytes);
       encoder.encode(toEncode, ecBytes);
+      corrupt(toEncode, ecBytes / 2, random);
       decoder.decode(toEncode, ecBytes);
       assertArraysEqual(original, 0, toEncode, 0, dataBytes);
     }