4 files changed, 4 insertions, 4 deletions
diff --git a/include/cppunit/SynchronizedObject.h b/include/cppunit/SynchronizedObject.h
index 59c3cbb..68bd0cf 100644
--- a/include/cppunit/SynchronizedObject.h
+++ b/include/cppunit/SynchronizedObject.h
@@ -36,7 +36,7 @@ public:
 
   /*! Constructs a SynchronizedObject object.
    */
-  SynchronizedObject( SynchronizationObject *syncObject =0 );
+  SynchronizedObject( SynchronizationObject *syncObject = nullptr );
 
   /// Destructor.
   virtual ~SynchronizedObject();
diff --git a/include/cppunit/TestResult.h b/include/cppunit/TestResult.h
index 3c4ddc9..7dc2402 100644
--- a/include/cppunit/TestResult.h
+++ b/include/cppunit/TestResult.h
@@ -48,7 +48,7 @@ class CPPUNIT_API TestResult : protected SynchronizedObject
 {
 public:
   /// Construct a TestResult
-  TestResult( SynchronizationObject *syncObject = 0 );
+  TestResult( SynchronizationObject *syncObject = nullptr );
 
   /// Destroys a test result
   virtual ~TestResult() override;
diff --git a/include/cppunit/TestResultCollector.h b/include/cppunit/TestResultCollector.h
index 287f019..314f1cc 100644
--- a/include/cppunit/TestResultCollector.h
+++ b/include/cppunit/TestResultCollector.h
@@ -37,7 +37,7 @@ public:
 
   /*! Constructs a TestResultCollector object.
    */
-  TestResultCollector( SynchronizationObject *syncObject = 0 );
+  TestResultCollector( SynchronizationObject *syncObject = nullptr );
 
   /// Destructor.
   virtual ~TestResultCollector() override;
diff --git a/include/cppunit/TestSuccessListener.h b/include/cppunit/TestSuccessListener.h
index 18de362..714fbf6 100644
--- a/include/cppunit/TestSuccessListener.h
+++ b/include/cppunit/TestSuccessListener.h
@@ -17,7 +17,7 @@ class CPPUNIT_API TestSuccessListener : public TestListener,
 public:
   /*! Constructs a TestSuccessListener object.
    */
-  TestSuccessListener( SynchronizationObject *syncObject = 0 );
+  TestSuccessListener( SynchronizationObject *syncObject = nullptr );
 
   /// Destructor.
   virtual ~TestSuccessListener() override;