diff --git a/deeplearning4j/deeplearning4j-cuda/src/test/java/org/deeplearning4j/ValidateCuDNN.java b/deeplearning4j/deeplearning4j-cuda/src/test/java/org/deeplearning4j/ValidateCuDNN.java
index 1d393aaf4..eed9f2efa 100644
--- a/deeplearning4j/deeplearning4j-cuda/src/test/java/org/deeplearning4j/ValidateCuDNN.java
+++ b/deeplearning4j/deeplearning4j-cuda/src/test/java/org/deeplearning4j/ValidateCuDNN.java
@@ -248,7 +248,7 @@ public class ValidateCuDNN extends BaseDL4JTest {
             Nd4j.getRandom().setSeed(12345);
             INDArray features = Nd4j.rand(fShape);
             INDArray labels = Nd4j.rand(lShape);
-            labels = Nd4j.exec(new IsMax(labels, 1));
+            labels = Nd4j.exec(new IsMax(labels, 1))[0].castTo(features.dataType());
 
             List<CuDNNValidationUtil.TestCase> testCaseList = new ArrayList<>();
 
@@ -256,7 +256,7 @@ public class ValidateCuDNN extends BaseDL4JTest {
             for (int i = 0; i < 6; i++) {
                 INDArray f = Nd4j.rand(fShape);
                 INDArray l = Nd4j.rand(lShape);
-                Nd4j.exec(new IsMax(l, 1))[0];
+                l = Nd4j.exec(new IsMax(l, 1))[0].castTo(features.dataType());
                 dataSets.add(new DataSet(f, l));
             }
             DataSetIterator iter = new ExistingDataSetIterator(dataSets);
diff --git a/deeplearning4j/deeplearning4j-scaleout/spark/dl4j-spark/pom.xml b/deeplearning4j/deeplearning4j-scaleout/spark/dl4j-spark/pom.xml
index 8bc852fbd..8b31872c5 100644
--- a/deeplearning4j/deeplearning4j-scaleout/spark/dl4j-spark/pom.xml
+++ b/deeplearning4j/deeplearning4j-scaleout/spark/dl4j-spark/pom.xml
@@ -70,6 +70,13 @@
             <artifactId>deeplearning4j-play_2.11</artifactId>
             <version>${deeplearning4j.version}</version>
             <scope>test</scope>
+            <exclusions>
+                <!-- To avoid clashing net.jpountz.lz4:lz4:1.3.0 and org.lz4:lz4-java:jar:1.4.0 - -->
+                <exclusion>
+                    <groupId>net.jpountz.lz4</groupId>
+                    <artifactId>lz4</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <dependency>