diff --git a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFLineChartData.java b/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFLineChartData.java
index 3b7bac759..c4c04b8d9 100644
--- a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFLineChartData.java
+++ b/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFLineChartData.java
@@ -58,11 +58,11 @@ public class TestXSSFLineChartData extends TestCase {
 
         ChartDataSource<String> xs = DataSources.fromStringCellRange(sheet, CellRangeAddress.valueOf("A1:J1"));
         ChartDataSource<Number> ys = DataSources.fromNumericCellRange(sheet, CellRangeAddress.valueOf("A2:J2"));
-        LineChartSerie serie = lineChartData.addSerie(xs, ys);
+        LineChartSerie series = lineChartData.addSerie(xs, ys);
 
-        assertNotNull(serie);
+        assertNotNull(series);
         assertEquals(1, lineChartData.getSeries().size());
-        assertTrue(lineChartData.getSeries().contains(serie));
+        assertTrue(lineChartData.getSeries().contains(series));
 
         chart.plot(lineChartData, bottomAxis, leftAxis);
     }
diff --git a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFScatterChartData.java b/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFScatterChartData.java
index 87f8ea7b1..2780a5176 100644
--- a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFScatterChartData.java
+++ b/src/ooxml/testcases/org/apache/poi/xssf/usermodel/charts/TestXSSFScatterChartData.java
@@ -52,11 +52,11 @@ public final class TestXSSFScatterChartData extends TestCase {
 
         ChartDataSource<String> xs = DataSources.fromStringCellRange(sheet, CellRangeAddress.valueOf("A1:J1"));
         ChartDataSource<Number> ys = DataSources.fromNumericCellRange(sheet, CellRangeAddress.valueOf("A2:J2"));
-        ScatterChartSerie serie = scatterChartData.addSerie(xs, ys);
+        ScatterChartSerie series = scatterChartData.addSerie(xs, ys);
 
-        assertNotNull(serie);
+        assertNotNull(series);
         assertEquals(1, scatterChartData.getSeries().size());
-        assertTrue(scatterChartData.getSeries().contains(serie));
+        assertTrue(scatterChartData.getSeries().contains(series));
 
         chart.plot(scatterChartData, bottomAxis, leftAxis);
     }