diff --git a/engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencer.java b/engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencer.java
index d5a6fbd13..2d2d591db 100644
--- a/engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencer.java
+++ b/engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencer.java
@@ -83,7 +83,9 @@ public class BucketSequencer<T> implements ElementSequencer<T> {
         for (int i = 0; i < elems.size(); i++) {
             T elem = elems.get(i);
             long ratio = ratios.get(i);
-            buckets.add(new OpBucket<>(elem,i,ratio));
+            if (ratio>0) {
+                buckets.add(new OpBucket<>(elem,i,ratio));
+            }
         }
 
         while(!buckets.isEmpty()) {
diff --git a/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencerTest.java b/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencerTest.java
new file mode 100644
index 000000000..98b90d262
--- /dev/null
+++ b/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/BucketSequencerTest.java
@@ -0,0 +1,19 @@
+package io.nosqlbench.engine.api.activityapi.planning;
+
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.junit.Assert.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class BucketSequencerTest {
+
+    @Test
+    public void testBasicRatios() {
+        BucketSequencer<String> buckets = new BucketSequencer<>();
+        int[] ints = buckets.seqIndexesByRatios(List.of("a","b","c"), List.of(0L, 2L, 3L));
+        assertThat(ints).containsExactly(1,2,1,2,2);
+    }
+
+}
diff --git a/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/ConcatSequencerTest.java b/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/ConcatSequencerTest.java
index 651b4f0dc..3b312eaa2 100644
--- a/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/ConcatSequencerTest.java
+++ b/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/ConcatSequencerTest.java
@@ -40,10 +40,17 @@ public class ConcatSequencerTest {
         assertThat(ints).containsExactly(0,0,1,1,1,1,1);
     }
 
+    @Test
+    public void testSeqIndexWithZeroRatios() {
+        ConcatSequencer<String> concat = new ConcatSequencer<>();
+        int[] ints = concat.seqIndexesByRatios(strings(a,b), ratios(0,3));
+        assertThat(ints).containsExactly(1,1,1);
+    }
+
     private static List<String> strings(String... strings) {
         return Arrays.asList(strings);
     }
     private static List<Long> ratios(long... longs) {
         return Arrays.stream(longs).boxed().collect(Collectors.toList());
     }
-}
\ No newline at end of file
+}
diff --git a/engine-api/src/test/java/io/nosqlbench/engine/api/util/IntervalSequencerTest.java b/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/planning/IntervalSequencerTest.java
similarity index 91%
rename from engine-api/src/test/java/io/nosqlbench/engine/api/util/IntervalSequencerTest.java
rename to engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/planning/IntervalSequencerTest.java
index fe83eb80b..cd89599b4 100644
--- a/engine-api/src/test/java/io/nosqlbench/engine/api/util/IntervalSequencerTest.java
+++ b/engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/planning/planning/IntervalSequencerTest.java
@@ -15,7 +15,7 @@
  * /
  */
 
-package io.nosqlbench.engine.api.util;
+package io.nosqlbench.engine.api.activityapi.planning;
 
 import io.nosqlbench.engine.api.activityapi.planning.ElementSequencer;
 import io.nosqlbench.engine.api.activityapi.planning.IntervalSequencer;
@@ -32,6 +32,7 @@ public class IntervalSequencerTest {
 
     private static ElementSequencer<AnEvent> seqr = new IntervalSequencer<>();
 
+
     @Test
     public void testFixture() {
         List<AnEvent> events = fromText("A:1,B:15");
@@ -49,6 +50,13 @@ public class IntervalSequencerTest {
         assertThat(seq).isEqualTo("ABCDAABAABCAABA");
     }
 
+    @Test
+    public void testO4I3L0() {
+        List<AnEvent> events = fromText("O:4,I:3,L:0");
+        String seq = seqr.sequenceSummary(events, ratioFunc, "");
+        assertThat(seq).isEqualTo("OIOIOIO");
+    }
+
     @Test
     public void testO4I3() {
         List<AnEvent> events = fromText("O:4,I:3");
@@ -98,4 +106,4 @@ public class IntervalSequencerTest {
 
     }
 
-}
\ No newline at end of file
+}