diff --git a/u4/U4SensorIdentifierDefault.h b/u4/U4SensorIdentifierDefault.h
index 78e57e7443..4fbb30e935 100644
--- a/u4/U4SensorIdentifierDefault.h
+++ b/u4/U4SensorIdentifierDefault.h
@@ -121,12 +121,6 @@ inline int U4SensorIdentifierDefault::getInstanceIdentity( const G4VPhysicalVolu
 
     int identifier = is_sensor ? copyno : -1  ;
 
-    //bool is_interesting_copyno = IsInterestingCopyNo(copyno) ;
-    //bool dump = is_sensor && is_interesting_copyno ;
-    //bool dump = false ;
-    //bool dump = true ;
-    //bool dump = num_sd > 0 ;
-
     if(level > 0) std::cout
         << "U4SensorIdentifierDefault::getIdentity"
         << " level " << level
@@ -139,7 +133,6 @@ inline int U4SensorIdentifierDefault::getInstanceIdentity( const G4VPhysicalVolu
         << std::endl
         ;
 
-
     return identifier ;
 }
 
@@ -177,5 +170,3 @@ inline bool U4SensorIdentifierDefault::IsInterestingCopyNo( int copyno )
            )
         ;
 }
-
-
diff --git a/u4/tests/CMakeLists.txt b/u4/tests/CMakeLists.txt
index 91b7469045..35cb950d29 100644
--- a/u4/tests/CMakeLists.txt
+++ b/u4/tests/CMakeLists.txt
@@ -59,10 +59,6 @@ set(TEST_SOURCES
 
    U4Debug_Test.cc 
    U4Hit_Debug_Test.cc 
-
-   G4ThreeVectorTest.cc 
-
-
    U4PhysicsTableTest.cc 
 )
 
diff --git a/u4/tests/FewPMT_test.cc b/u4/tests/FewPMT_test.cc
deleted file mode 100644
index fc54fb1903..0000000000
--- a/u4/tests/FewPMT_test.cc
+++ /dev/null
@@ -1,10 +0,0 @@
-#include "NPFold.h"
-
-int main()
-{
-    const char* path = "$PMTSimParamData_BASE" ; 
-    NPFold* jpmt = NPFold::Exists(path) ? NPFold::Load(path) : nullptr ; 
-    std::cout << path << std::endl << ( jpmt ? jpmt->desc() : "-" ) << std::endl ; 
-
-    return 0 ; 
-}
diff --git a/u4/tests/FewPMT_test.sh b/u4/tests/FewPMT_test.sh
deleted file mode 100755
index f7757451b6..0000000000
--- a/u4/tests/FewPMT_test.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/bash -l 
-
-source FewPMT.sh 
-name=FewPMT_test
-gcc $name.cc -I$HOME/np -std=c++11 -lstdc++ -o /tmp/$name && /tmp/$name
-
-
-
diff --git a/u4/tests/G4ThreeVectorTest.cc b/u4/tests/G4ThreeVectorTest.cc
deleted file mode 100644
index 17264959da..0000000000
--- a/u4/tests/G4ThreeVectorTest.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
-G4ThreeVectorTest.cc
-======================
-
-::
-
-    g4-cls ThreeVector
-
-**/
-
-
-#include <iostream>
-#include "G4ThreeVector.hh"
-
-int main(int argc, char** argv)
-{
-    G4ThreeVector a(1., 2., 3.); 
-    a.set(10.,20.,30.); 
-
-    std::cout << " sizeof(a) " << sizeof(a) << std::endl ; 
-    std::cout << " sizeof(double)*3 " << sizeof(double)*3  << std::endl; 
-
-    const double* aa = (const double*)&a ; 
-    for(int i=0 ; i < 3 ; i++ ) std::cout << aa[i] << std::endl ;   
-
-    return 0 ; 
-}
diff --git a/u4/tests/U4SensorIdentifierDefault_test.cc b/u4/tests/U4SensorIdentifierDefault_test.cc
deleted file mode 100644
index 1a01579b7c..0000000000
--- a/u4/tests/U4SensorIdentifierDefault_test.cc
+++ /dev/null
@@ -1,32 +0,0 @@
-// name=U4SensorIdentifierDefault_test ; gcc $name.cc -std=c++11 -lstdc++ -o /tmp/$name && /tmp/$name
-
-#include <iostream>
-
-bool IsInterestingCopyNo( int copyno )
-{
-    return 
-        copyno > -1 && 
-           (
-            (std::abs( copyno -      0 ) < 100) || 
-            (std::abs( copyno -  17612 ) < 100) ||
-            (std::abs( copyno -  30000 ) < 100) ||
-            (std::abs( copyno -  32400 ) < 100) ||
-            (std::abs( copyno - 300000 ) < 100) || 
-            (std::abs( copyno - 325600 ) < 100)  
-           )
-        ;   
-}
-
-
-int main()
-{
-    int count = 0 ; 
-    for(int i=0 ; i < 400000 ; i++) 
-    {
-       bool select = IsInterestingCopyNo(i) ; 
-       if(select) count += 1  ; 
-       if(select) std::cout << i << std::endl ; 
-    }
-    std::cout << " count " << count << std::endl ; 
-}
-