diff --git a/engine/table/src/test/java/io/deephaven/engine/table/impl/QueryTableAggregationTest.java b/engine/table/src/test/java/io/deephaven/engine/table/impl/QueryTableAggregationTest.java
index f3a626cf969..6a93b9cd41f 100644
--- a/engine/table/src/test/java/io/deephaven/engine/table/impl/QueryTableAggregationTest.java
+++ b/engine/table/src/test/java/io/deephaven/engine/table/impl/QueryTableAggregationTest.java
@@ -2791,7 +2791,8 @@ public void testTDigestIncremental() {
         final QueryTable queryTable = getTable(size, random,
                 columnInfos = initColumnInfos(new String[] {"Sym", "doubleCol", "longCol"},
                         new SetGenerator<>("a", "b", "c", "d"),
-                        new DoubleGenerator(-10000, 10000, 0.05, 0.05),
+                        // TODO (deephaven-core#4743) verify this change in range
+                        new DoubleGenerator(0, 10000, 0.05, 0.05),
                         new LongGenerator(0, 1_000_000_000L)));
 
         final Collection<? extends Aggregation> aggregations = List.of(
diff --git a/engine/table/src/test/java/io/deephaven/engine/table/impl/updateby/BaseUpdateByTest.java b/engine/table/src/test/java/io/deephaven/engine/table/impl/updateby/BaseUpdateByTest.java
index c8f7864ec00..9dd2cb2b4cc 100644
--- a/engine/table/src/test/java/io/deephaven/engine/table/impl/updateby/BaseUpdateByTest.java
+++ b/engine/table/src/test/java/io/deephaven/engine/table/impl/updateby/BaseUpdateByTest.java
@@ -69,7 +69,8 @@ static CreateResult createTestTable(int tableSize,
                 new ShortGenerator((short) -6000, (short) 65535, .1),
                 new IntGenerator(10, 100, .1),
                 new LongGenerator(10, 100, .1),
-                new FloatGenerator(-100, 100, .1),
+                // TODO (deephaven-core#4743) verify this change in range
+                new FloatGenerator(0, 100, .1),
                 new DoubleGenerator(10.1, 20.1, .1),
                 new BooleanGenerator(.5, .1),
                 new BigIntegerGenerator(new BigInteger("-10"), new BigInteger("10"), .1),
diff --git a/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/BigIntegerGenerator.java b/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/BigIntegerGenerator.java
index 7bde60e1e5e..5afda3aaccb 100644
--- a/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/BigIntegerGenerator.java
+++ b/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/BigIntegerGenerator.java
@@ -20,7 +20,7 @@ public BigIntegerGenerator() {
 
     public BigIntegerGenerator(double nullFraction) {
         this(BigInteger.valueOf(Long.MIN_VALUE).multiply(BigInteger.valueOf(2)),
-                BigInteger.valueOf(Long.MAX_VALUE).multiply(BigInteger.valueOf(2)), 0);
+                BigInteger.valueOf(Long.MAX_VALUE).multiply(BigInteger.valueOf(2)), nullFraction);
     }
 
     public BigIntegerGenerator(BigInteger from, BigInteger to) {
diff --git a/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/DoubleGenerator.java b/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/DoubleGenerator.java
index 808f31df6cd..dfe9ac97335 100644
--- a/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/DoubleGenerator.java
+++ b/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/DoubleGenerator.java
@@ -22,7 +22,7 @@ public class DoubleGenerator extends AbstractGenerator<Double> {
     private final double posInfFraction;
 
     public DoubleGenerator() {
-        this(QueryConstants.NULL_DOUBLE + 1, Double.MAX_VALUE);
+        this(Math.nextUp(-Double.MAX_VALUE), Double.MAX_VALUE);
     }
 
     public DoubleGenerator(double from, double to) {
@@ -74,7 +74,7 @@ private double generateDouble(Random random) {
                 return Double.POSITIVE_INFINITY;
             }
         }
-        return from + (random.nextDouble() * to - from);
+        return (from / 2 + (random.nextDouble() * (to / 2 - from / 2))) * 2;
     }
 
     @Override
diff --git a/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/FloatGenerator.java b/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/FloatGenerator.java
index 86f8f2242f7..c4b6ffa28c1 100644
--- a/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/FloatGenerator.java
+++ b/engine/test-utils/src/main/java/io/deephaven/engine/testutil/generator/FloatGenerator.java
@@ -17,7 +17,7 @@ public class FloatGenerator extends AbstractGenerator<Float> {
     private final double posInfFraction;
 
     public FloatGenerator() {
-        this(QueryConstants.NULL_FLOAT + 1, Float.MAX_VALUE);
+        this(Math.nextUp(-Float.MAX_VALUE), Float.MAX_VALUE);
     }
 
     public FloatGenerator(float from, float to) {
@@ -69,7 +69,7 @@ private float generateFloat(Random random) {
                 return Float.POSITIVE_INFINITY;
             }
         }
-        return from + (random.nextFloat() * to - from);
+        return (from / 2 + (random.nextFloat() * (to / 2 - from / 2))) * 2;
     }
 
     @Override