diff --git a/pom.xml b/pom.xml
index 6871667df..9eeab1dda 100644
--- a/pom.xml
+++ b/pom.xml
@@ -88,7 +88,7 @@ under the License.
     <!-- END:UNIQUE FOR THIS JAVA COMPONENT -->
 
     <!-- Test -->
-    <testng.version>7.4.0</testng.version>
+    <testng.version>7.5</testng.version>
 
     <!-- System-wide properties -->
     <maven.version>3.5.0</maven.version>
diff --git a/src/main/java/org/apache/datasketches/fdt/FdtSketch.java b/src/main/java/org/apache/datasketches/fdt/FdtSketch.java
index 4b4617e84..79e51a976 100644
--- a/src/main/java/org/apache/datasketches/fdt/FdtSketch.java
+++ b/src/main/java/org/apache/datasketches/fdt/FdtSketch.java
@@ -93,7 +93,6 @@ public FdtSketch(final FdtSketch sketch) {
   /**
    * @return a deep copy of this sketch
    */
-  @SuppressWarnings("unchecked")
   @Override
   public FdtSketch copy() {
     return new FdtSketch(this);
diff --git a/src/main/java/org/apache/datasketches/kll/KllHelper.java b/src/main/java/org/apache/datasketches/kll/KllHelper.java
index dfbcdf7a5..5655296a6 100644
--- a/src/main/java/org/apache/datasketches/kll/KllHelper.java
+++ b/src/main/java/org/apache/datasketches/kll/KllHelper.java
@@ -622,7 +622,6 @@ static byte[] fastSingleItemCompactByteArray(final KllSketch mine) {
     return byteArr;
   }
 
-  @SuppressWarnings("null")
   static String toStringImpl(final KllSketch mine, final boolean withLevels, final boolean withData) {
     final boolean doubleType = (mine.sketchType == DOUBLES_SKETCH);
     final int k = mine.getK();
@@ -760,7 +759,6 @@ static int ubOnNumLevels(final long n) {
    * at the bottom.  Only numLevels, the levels array and the items array are affected.
    * @param mine the current sketch
    */
-  @SuppressWarnings("null")
   private static void addEmptyTopLevelToCompletelyFullSketch(final KllSketch mine) {
     final int[] myCurLevelsArr = mine.getLevelsArray();
     final int myCurNumLevels = mine.getNumLevels();
diff --git a/src/test/java/org/apache/datasketches/kll/KllDirectDoublesSketchTest.java b/src/test/java/org/apache/datasketches/kll/KllDirectDoublesSketchTest.java
index d43751e01..edc701099 100644
--- a/src/test/java/org/apache/datasketches/kll/KllDirectDoublesSketchTest.java
+++ b/src/test/java/org/apache/datasketches/kll/KllDirectDoublesSketchTest.java
@@ -614,7 +614,6 @@ public void checkReverseMergeKllDoubleSketch() {
   }
 
   @Test
-  @SuppressWarnings("unused")
   public void checkWritableWrapOfCompactForm() {
     KllDoublesSketch sk = KllDoublesSketch.newHeapInstance(20);
     for (int i = 1; i <= 21; i++ ) { sk.update(i); }
diff --git a/src/test/java/org/apache/datasketches/kll/KllDirectFloatsSketchTest.java b/src/test/java/org/apache/datasketches/kll/KllDirectFloatsSketchTest.java
index a159dc545..40d88dde0 100644
--- a/src/test/java/org/apache/datasketches/kll/KllDirectFloatsSketchTest.java
+++ b/src/test/java/org/apache/datasketches/kll/KllDirectFloatsSketchTest.java
@@ -614,7 +614,6 @@ public void checkReverseMergeKllFloatsSketch() {
   }
 
   @Test
-  @SuppressWarnings("unused")
   public void checkWritableWrapOfCompactForm() {
     KllFloatsSketch sk = KllFloatsSketch.newHeapInstance(20);
     for (int i = 1; i <= 21; i++ ) { sk.update(i); }
diff --git a/src/test/java/org/apache/datasketches/kll/KllDoublesSketchTest.java b/src/test/java/org/apache/datasketches/kll/KllDoublesSketchTest.java
index 5684084ac..b2e3eda18 100644
--- a/src/test/java/org/apache/datasketches/kll/KllDoublesSketchTest.java
+++ b/src/test/java/org/apache/datasketches/kll/KllDoublesSketchTest.java
@@ -32,7 +32,6 @@
 import org.apache.datasketches.memory.WritableMemory;
 import org.testng.annotations.Test;
 
-@SuppressWarnings("javadoc")
 public class KllDoublesSketchTest {
   private static final double PMF_EPS_FOR_K_8 = 0.35; // PMF rank error (epsilon) for k=8
   private static final double PMF_EPS_FOR_K_128 = 0.025; // PMF rank error (epsilon) for k=128
@@ -277,13 +276,11 @@ public void mergeMinAndMaxFromOther() {
     assertEquals(sketch2.getMaxValue(), 1_000_000);
   }
 
-  @SuppressWarnings("unused")
   @Test(expectedExceptions = SketchesArgumentException.class)
   public void kTooSmall() {
     KllDoublesSketch.newHeapInstance(KllSketch.DEFAULT_M - 1);
   }
 
-  @SuppressWarnings("unused")
   @Test(expectedExceptions = SketchesArgumentException.class)
   public void kTooLarge() {
     KllDoublesSketch.newHeapInstance(KllSketch.MAX_K + 1);
diff --git a/src/test/java/org/apache/datasketches/kll/KllDoublesValidationTest.java b/src/test/java/org/apache/datasketches/kll/KllDoublesValidationTest.java
index bcc92cc1e..bd0cfb0df 100644
--- a/src/test/java/org/apache/datasketches/kll/KllDoublesValidationTest.java
+++ b/src/test/java/org/apache/datasketches/kll/KllDoublesValidationTest.java
@@ -37,7 +37,7 @@
 //These results are for the version that delays the roll up until the next value comes in.
 //The @Test annotations have to be enabled to use this class and a section in KllDoublesHelper also
 //needs to be enabled.
-@SuppressWarnings({ "javadoc", "unused" })
+@SuppressWarnings("unused")
 public class KllDoublesValidationTest {
 
   //Used only with manual running of checkTestResults(..)
diff --git a/src/test/java/org/apache/datasketches/kll/KllFloatsSketchTest.java b/src/test/java/org/apache/datasketches/kll/KllFloatsSketchTest.java
index a30e77f8c..09bda87dd 100644
--- a/src/test/java/org/apache/datasketches/kll/KllFloatsSketchTest.java
+++ b/src/test/java/org/apache/datasketches/kll/KllFloatsSketchTest.java
@@ -33,7 +33,6 @@
 import org.apache.datasketches.memory.WritableMemory;
 import org.testng.annotations.Test;
 
-@SuppressWarnings("javadoc")
 public class KllFloatsSketchTest {
   private static final double PMF_EPS_FOR_K_8 = 0.35; // PMF rank error (epsilon) for k=8
   private static final double PMF_EPS_FOR_K_128 = 0.025; // PMF rank error (epsilon) for k=128
@@ -278,13 +277,11 @@ public void mergeMinAndMaxFromOther() {
     assertEquals(sketch2.getMaxValue(), 1_000_000F);
   }
 
-  @SuppressWarnings("unused")
   @Test(expectedExceptions = SketchesArgumentException.class)
   public void kTooSmall() {
     KllFloatsSketch.newHeapInstance(KllSketch.DEFAULT_M - 1);
   }
 
-  @SuppressWarnings("unused")
   @Test(expectedExceptions = SketchesArgumentException.class)
   public void kTooLarge() {
     KllFloatsSketch.newHeapInstance(KllSketch.MAX_K + 1);
diff --git a/src/test/java/org/apache/datasketches/kll/KllFloatsValidationTest.java b/src/test/java/org/apache/datasketches/kll/KllFloatsValidationTest.java
index 278d760c6..cdb0f0ac3 100644
--- a/src/test/java/org/apache/datasketches/kll/KllFloatsValidationTest.java
+++ b/src/test/java/org/apache/datasketches/kll/KllFloatsValidationTest.java
@@ -37,7 +37,7 @@
 // These results are for the version that delays the roll up until the next value comes in.
 // The @Test annotations have to be enabled to use this class and a section in KllFloatsHelper also
 // needs to be enabled.
-@SuppressWarnings({ "javadoc", "unused" })
+@SuppressWarnings("unused")
 public class KllFloatsValidationTest {
 
   //Used only with manual running of checkTestResults(..)
diff --git a/src/test/java/org/apache/datasketches/kll/MiscDoublesTest.java b/src/test/java/org/apache/datasketches/kll/MiscDoublesTest.java
index e86488aab..656343ccb 100644
--- a/src/test/java/org/apache/datasketches/kll/MiscDoublesTest.java
+++ b/src/test/java/org/apache/datasketches/kll/MiscDoublesTest.java
@@ -35,7 +35,6 @@
 /**
  * @author Lee Rhodes
  */
-@SuppressWarnings("javadoc")
 public class MiscDoublesTest {
   static final String LS = System.getProperty("line.separator");
   private final MemoryRequestServer memReqSvr = new DefaultMemoryRequestServer();
diff --git a/src/test/java/org/apache/datasketches/kll/MiscFloatsTest.java b/src/test/java/org/apache/datasketches/kll/MiscFloatsTest.java
index 57cc244a0..0b100e482 100644
--- a/src/test/java/org/apache/datasketches/kll/MiscFloatsTest.java
+++ b/src/test/java/org/apache/datasketches/kll/MiscFloatsTest.java
@@ -35,7 +35,6 @@
 /**
  * @author Lee Rhodes
  */
-@SuppressWarnings("javadoc")
 public class MiscFloatsTest {
   static final String LS = System.getProperty("line.separator");
   private final MemoryRequestServer memReqSvr = new DefaultMemoryRequestServer();