diff --git a/examples/build.gradle b/examples/build.gradle
index 559dd44..15ab280 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -20,4 +20,7 @@
     implementation project(':scratchpad')
 
     implementation "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+
+	testImplementation project(path: ':ooxml', configuration: 'tests')
+	testImplementation project(path: ':main', configuration: 'tests')
 }
diff --git a/examples/src/main/java/org/apache/poi/examples/xssf/eventusermodel/XLSX2CSV.java b/examples/src/main/java/org/apache/poi/examples/xssf/eventusermodel/XLSX2CSV.java
index 627e0f7..81235f0 100644
--- a/examples/src/main/java/org/apache/poi/examples/xssf/eventusermodel/XLSX2CSV.java
+++ b/examples/src/main/java/org/apache/poi/examples/xssf/eventusermodel/XLSX2CSV.java
@@ -128,6 +128,12 @@
             for (int i=0; i<missedCols; i++) {
                 output.append(',');
             }
+
+            // no need to append anything if we do not have a value
+            if (formattedValue == null) {
+                return;
+            }
+
             currentCol = thisCol;
 
             // Number or string?
@@ -136,8 +142,14 @@
                 Double.parseDouble(formattedValue);
                 output.append(formattedValue);
             } catch (Exception e) {
+                // let's remove quotes if they are already there
+                if (formattedValue.startsWith("\"") && formattedValue.endsWith("\"")) {
+                    formattedValue = formattedValue.substring(1, formattedValue.length()-1);
+                }
+
                 output.append('"');
-                output.append(formattedValue);
+                // encode double-quote with two double-quotes to produce a valid CSV format
+                output.append(formattedValue.replace("\"", "\"\""));
                 output.append('"');
             }
         }
diff --git a/ooxml/build.gradle b/ooxml/build.gradle
index 2937e48..3fac94e 100644
--- a/ooxml/build.gradle
+++ b/ooxml/build.gradle
@@ -50,7 +50,17 @@
     }
 }
 
-test {
-    // for some reason catching the OOM does not work when run from Gradle
-    exclude '**/MemoryUsage.class'
-}
\ No newline at end of file
+// Create a separate jar for test-code to depend on it in other projects
+// See http://stackoverflow.com/questions/5144325/gradle-test-dependency
+task testJar(type: Jar, dependsOn: testClasses) {
+	baseName = "test-${project.archivesBaseName}"
+	from sourceSets.test.output
+}
+
+configurations {
+	tests
+}
+
+artifacts {
+	tests testJar
+}