diff --git a/server/src/test/java/org/elasticsearch/monitor/os/OsStatsTests.java b/server/src/test/java/org/elasticsearch/monitor/os/OsStatsTests.java
index 8581e566cda8e..fabd7ff127adc 100644
--- a/server/src/test/java/org/elasticsearch/monitor/os/OsStatsTests.java
+++ b/server/src/test/java/org/elasticsearch/monitor/os/OsStatsTests.java
@@ -84,12 +84,12 @@ public void testSerialization() throws IOException {
     }
 
     public void testGetUsedMemoryWithZeroTotal() {
-        OsStats.Mem mem = new OsStats.Mem(0, randomLong());
+        OsStats.Mem mem = new OsStats.Mem(0, randomNonNegativeLong());
         assertThat(mem.getUsed().getBytes(), equalTo(0L));
     }
 
     public void testGetUsedSwapWithZeroTotal() {
-        OsStats.Swap swap = new OsStats.Swap(0, randomLong());
+        OsStats.Swap swap = new OsStats.Swap(0, randomNonNegativeLong());
         assertThat(swap.getUsed().getBytes(), equalTo(0L));
     }
 }