diff --git a/DDTest/src/test_PolarGridRPhi2.cc b/DDTest/src/test_PolarGridRPhi2.cc
index 14d2d151a165801f9ea487013f5e6ab2e847248e..be16c0ddda6cfbf3fea855a9ab4529ced2049357 100644
--- a/DDTest/src/test_PolarGridRPhi2.cc
+++ b/DDTest/src/test_PolarGridRPhi2.cc
@@ -17,7 +17,8 @@ public:
 };
 
 int main() {
-  dd4hep::DDTest test( "PolarGridRPhi2" ) ;
+  dd4hep::DDTest test( "PolarGridRPhi2" );
+
   try{
 
     dd4hep::DDSegmentation::PolarGridRPhi2 seg("system:8,layer:8,barrel:3,layer:8,slice:5,r:16,phi:16");
diff --git a/DDTest/src/test_bitfield64.cc b/DDTest/src/test_bitfield64.cc
index 49ea6109f512bfdd7d50795cbe937e14b47c93c5..2159fdffc38b5fd81e4122aed8ca348f492c443e 100644
--- a/DDTest/src/test_bitfield64.cc
+++ b/DDTest/src/test_bitfield64.cc
@@ -6,9 +6,9 @@
 
 #include "DDSegmentation/BitField64.h"
 
-using namespace std ;
-using namespace dd4hep ;
-using namespace DDSegmentation ;
+using namespace std;
+using namespace dd4hep;
+using namespace DDSegmentation;
 
 //=============================================================================
 int main(int /* argc */, char** /* argv */ ){
diff --git a/DDTest/src/test_bitfieldcoder.cc b/DDTest/src/test_bitfieldcoder.cc
index e6f6bae59a34c6e81c6178cd7bc7b4c890e89fae..98dd025cb3478cb5140d586c6f907f1ea840a5b7 100644
--- a/DDTest/src/test_bitfieldcoder.cc
+++ b/DDTest/src/test_bitfieldcoder.cc
@@ -6,10 +6,9 @@
 
 #include "DDSegmentation/BitFieldCoder.h"
 
-
-using namespace std ;
-using namespace dd4hep ;
-using namespace DDSegmentation ;
+using namespace std;
+using namespace dd4hep;
+using namespace DDSegmentation;
 
 //=============================================================================
 int main(int /* argc */, char** /* argv */ ){
diff --git a/DDTest/src/test_example.cc b/DDTest/src/test_example.cc
index b41adde32d63e2126a1084b323995dcf144d19ee..d0fdc6b0fd73287d97b6055a817e71147ee374bc 100644
--- a/DDTest/src/test_example.cc
+++ b/DDTest/src/test_example.cc
@@ -8,7 +8,7 @@
 int main(int /* argc */, char** /* argv */ ){
 
   // this should be the first line in your test
-  dd4hep::DDTest test( "example" ) ; 
+  dd4hep::DDTest test( "example" );
     
   try{