diff --git a/.aux/test_with_lcg b/.aux/test_with_lcg
index 8923cec5..5a11d9c5 100755
--- a/.aux/test_with_lcg
+++ b/.aux/test_with_lcg
@@ -4,4 +4,4 @@ CMTCONFIG=$2
 source /cvmfs/sft.cern.ch/lcg/views/${LCG}/${CMTCONFIG}/setup.sh
 source build/INSTALL/thisostap.sh 
 cd build 
-ctest -N  && cmake .. -DCMAKE_INSTALL_PREFIX=./INSTALL/ && ctest -j4 --output-on-failure --test-output-size-failed=5000000
+ctest -N  && cmake .. -DCMAKE_INSTALL_PREFIX=./INSTALL/ && ctest -j4 -R '(gof|stat)' --output-on-failure --test-output-size-failed=5000000
diff --git a/ostap/CMakeLists.txt b/ostap/CMakeLists.txt
index c159bc99..01f078da 100644
--- a/ostap/CMakeLists.txt
+++ b/ostap/CMakeLists.txt
@@ -139,21 +139,21 @@ if ( ${PYTHON_VERSION} VERSION_GREATER_EQUAL "3.7" )
          message ( "----> warning (optional)            lmdb is NOT found!" )
       endif() 
    endif()
-endif() 
-
+endif()
+    
 # =======================================================================================
 ## joblib: run some numpy-related code in parallel
 # =======================================================================================
-
-find_python_module ( joblib          QUIET )
-if ( NOT ${PY_joblib_FOUND} )
-   execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install joblib ${PIP_ARGS})
-endif()
-find_python_module ( joblib          QUIET )
-if ( NOT ${PY_joblib_FOUND} )
-   message ( "----> warning (optional)          joblib is NOT found!" ) 
-endif()
- 
+if ( ${PYTHON_VERSION} VERSION_GREATER_EQUAL "3.0" )
+   find_python_module ( joblib          QUIET )
+   if ( NOT ${PY_joblib_FOUND} )
+      execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install joblib ${PIP_ARGS})
+   endif()
+   find_python_module ( joblib          QUIET )
+   if ( NOT ${PY_joblib_FOUND} )
+      message ( "----> warning (optional)          joblib is NOT found!" ) 
+   endif()
+ endif() 
 # ========================================================================================
 ## terminaltables3 & terminaltables 
 # ========================================================================================
diff --git a/ostap/stats/gof_np.py b/ostap/stats/gof_np.py
index c2eeb367..29f88b0d 100644
--- a/ostap/stats/gof_np.py
+++ b/ostap/stats/gof_np.py
@@ -23,6 +23,7 @@
     'PPDNP' , ## Point-to-Point Dissimilarity Goodness-of-fit method 
 )
 # =============================================================================
+from   ostap.core.meta_info     import python_info 
 from   ostap.core.ostap_types   import string_types 
 from   ostap.stats.gof          import normalize2 
 from   ostap.core.core          import SE, VE
@@ -207,12 +208,21 @@ def psi_conf ( psi , scale = 1.0 ) :
 
     raise TypeError ( "Unknown `psi':%s" % psi ) 
 
-try :
-    import joblib as jl
-except ImportError :
-    jl = None
 
-# =====================================================================
+# =============================================================================
+jl = None 
+# =============================================================================
+try : # =======================================================================
+    # =========================================================================
+    if ( 3 , 0 ) <= python_info :
+        with warnings.catch_warnings(): 
+            warnings.simplefilter ( "ignore" , category = DeprecationWarning  )
+            import joblib as jl
+    # =========================================================================
+except ImportError : # ========================================================
+    # =========================================================================
+    jl = None
+# =============================================================================
 ## @class PERMUTATOR
 #  Helper class that allow to run permutattion test in parallel 
 class PERMUTATOR(object) :
@@ -240,7 +250,7 @@ def __call__ ( self , N , silent = True ) :
         return counter
     
 # =============================================================================
-if jl : # =====================================================================
+if jl and ( 3 , 0 ) <= python_info : # ========================================
     # =========================================================================
     ## Run NN-permutations in parallel using joblib 
     def joblib_run ( self , NN , silent = True ) :
@@ -253,8 +263,8 @@ def joblib_run ( self , NN , silent = True ) :
         elif  '1.4.0' <= jl.__version__           : conf [ 'return_as' ] = 'unordered_generator'
         ##
         input   = ( jl.delayed (self)( N ) for N in lst )
-        results = jl.Parallel ( **conf ) ( input )
         counter = EffCounter()
+        results = jl.Parallel ( **conf ) ( input )
         for r in progress_bar ( results , max_value = nj , silent = silent ) :
             counter += r
         #