diff --git a/cwAudioBuf.cpp b/cwAudioBuf.cpp
index 905925f..aef77db 100644
--- a/cwAudioBuf.cpp
+++ b/cwAudioBuf.cpp
@@ -992,7 +992,7 @@ void cw::audio::buf::report(handle_t h)
 
 /// [cwAudioBufExample]
 
-cw::rc_t cw::audio::buf::test()
+cw::rc_t cw::audio::buf::test(const test::test_args_t& args)
 {
   rc_t     rc             = kOkRC;
   unsigned devIdx         = 0;
@@ -1087,8 +1087,8 @@ cw::rc_t cw::audio::buf::test()
   }
 
   for(i=0; i<sigN; ++i)
-    cwLogInfo("%f ",oSig[i]);
-  cwLogInfo("\n");
+    cwLogPrint("%f ",oSig[i]);
+  cwLogPrint("\n");
 
   destroy(h);
   
diff --git a/cwAudioBuf.h b/cwAudioBuf.h
index f652acb..e4f3b4f 100644
--- a/cwAudioBuf.h
+++ b/cwAudioBuf.h
@@ -236,7 +236,7 @@ namespace cw
       void report( handle_t h );
 
       // Run a buffer usage simulation to test the class. cmAudioPortTest.c calls this function.
-      rc_t test();
+      rc_t test(const test::test_args_t& args);
 
       //)
 
diff --git a/cwMtx.cpp b/cwMtx.cpp
index 27982d2..59e74bc 100644
--- a/cwMtx.cpp
+++ b/cwMtx.cpp
@@ -89,9 +89,10 @@ namespace cw
 
 
 
-cw::rc_t cw::mtx::test( const object_t* cfg )
+cw::rc_t cw::mtx::test( const test::test_args_t& args )
 {
   rc_t rc = kOkRC;
+  const object_t* cfg = args.test_args;
 
   d_t* mtx0 = nullptr;
   d_t* mtx1 = nullptr;
@@ -135,7 +136,7 @@ cw::rc_t cw::mtx::test( const object_t* cfg )
     mtx_y1 = allocCfg<double>(y1);
   
   unsigned n = offset(*mtx1,1,1);
-  printf("offset: %i\n",n);
+  cwLogPrint("offset: %i\n",n);
   
   
   report(*mtx0,"m0");
diff --git a/cwMtx.h b/cwMtx.h
index 4121e13..d364b5e 100644
--- a/cwMtx.h
+++ b/cwMtx.h
@@ -732,7 +732,7 @@ namespace cw
         double v = ele( m, idxV );
 
         // print the value
-        printf("%*.*f ",colWidth,decPl,v);
+        cwLogPrint("%*.*f ",colWidth,decPl,v);
       }
       else
       {
@@ -742,11 +742,11 @@ namespace cw
           {
             // print the dimension index for matrices with 3+ dim's
             if( i > 0 && j == 0 )
-              printf("%i\n",idxV[i-1]);
+              cwLogPrint("%i\n",idxV[i-1]);
 
             // print the row index for matrices with 2+ dim's
             if( m.dimN>1 )
-              printf("%i | ",j);
+              cwLogPrint("%i | ",j);
           }
           
           idxV[i] = j;
@@ -755,7 +755,7 @@ namespace cw
         
         // prevent multiple newlines on last printed line
         if( m.dimN==1 || (m.dimN>=2 && i > m.dimN-2) )
-          printf("\n");
+          cwLogPrint("\n");
       }
     }
     
@@ -774,10 +774,10 @@ namespace cw
     template< typename T >
       void report( const struct mtx_str<T>& m, const char* label, unsigned decPl=3, unsigned colWidth=10 )
     {
-      printf("%s :",label);
+      cwLogPrint("%s :",label);
       for(unsigned i=0; i<m.dimN; ++i)
-        printf("%i ", m.dimV[i] );
-      printf("\n");
+        cwLogPrint("%i ", m.dimV[i] );
+      cwLogPrint("\n");
       
       print(m,decPl,colWidth);
     }
@@ -896,7 +896,7 @@ namespace cw
       if( mcn != xrn )
         return cwLogError(kInvalidArgRC, "Mtx mult. failed. Size mismatch: m[%i,%i] x[%i,%i].",mrn,mcn,xrn,xcn);
 
-      //printf("%i %i : %i %i\n",mrn,mcn,xrn,xcn);
+      //cwLogPrint("%i %i : %i %i\n",mrn,mcn,xrn,xcn);
       
       resize(&y,yDimV, 2 );
 
@@ -936,7 +936,7 @@ namespace cw
     typedef struct mtx_str<float>  f_t;
     typedef struct mtx_str<double> d_t;
 
-    rc_t test( const struct object_str* cfg );
+    rc_t test( const test::test_args_t& args );
     
     
   }
diff --git a/cwTest.cpp b/cwTest.cpp
index b656db0..3bacda9 100644
--- a/cwTest.cpp
+++ b/cwTest.cpp
@@ -12,6 +12,13 @@
 #include "cwFile.h"
 #include "cwFileSys.h"
 #include "cwVectOps.h"
+#include "cwTextBuf.h"
+
+#include "cwAudioDevice.h"
+#include "cwAudioBufDecls.h"
+#include "cwAudioBuf.h"
+#include "cwMtx.h"
+
 #include "cwFlowTest.h"
 
 
@@ -32,6 +39,9 @@ namespace cw
       { "/vop",     vop::test },
       { "/time",    time::test },
       { "/flow",    flow::test },
+      { "/textBuf", textBuf::test },
+      { "/audioBuf",audio::buf::test },
+      { "/mtx",     mtx::test },
       { nullptr, nullptr },
     };
     
@@ -425,10 +435,23 @@ namespace cw
     {
       rc_t  rc               = kOkRC;
       char* new_module_label = filesys::makeFn(base_module_label,nullptr,nullptr,module_label,nullptr );
+
+      // form the module output directory
+      char* out_dir = filesys::makeFn(test.base_dir,nullptr,nullptr,test.out_folder,new_module_label,nullptr);
+
+      // verify that the the module output directory exists
+      if( !filesys::isDir(out_dir) )
+      {
+        if((rc = filesys::makeDir(out_dir)) != kOkRC )
+        {
+          rc = cwLogError(rc,"The module output directory '%s' create failed.",cwStringNullGuard(out_dir));
+          goto errLabel;
+        }
+      }
       
       switch( module_cfg->type_id() )
       {
-        case kStringTId:
+        case kStringTId:  // an external module file was given
           {
             const char* s = nullptr;
             if((rc = module_cfg->value(s)) != kOkRC )
@@ -441,7 +464,7 @@ namespace cw
           }
           break;
               
-        case kDictTId:
+        case kDictTId: // a nested module dict or case dict was given 
           rc = _proc_test_cfg(test, new_module_label, module_cfg );
           break;
 
@@ -450,6 +473,7 @@ namespace cw
       }                  
 
     errLabel:
+      mem::release(out_dir);
       mem::release(new_module_label);
       return rc;
     }
@@ -485,7 +509,7 @@ namespace cw
         }
       }
 
-      // if 
+      // if no keywords were found then the dictionary must be a list of cases
       if(module_args==nullptr && modules_cfg==nullptr && cases_cfg==nullptr )
       {
         cases_cfg = test_cfg;
diff --git a/cwTextBuf.cpp b/cwTextBuf.cpp
index df1c60c..9a25c74 100644
--- a/cwTextBuf.cpp
+++ b/cwTextBuf.cpp
@@ -1,6 +1,7 @@
 #include "cwCommon.h"
 #include "cwLog.h"
 #include "cwCommonImpl.h"
+#include "cwTest.h"
 #include "cwMem.h"
 #include "cwTextBuf.h"
 
@@ -164,7 +165,7 @@ cw::rc_t cw::textBuf::setFloatFormat( handle_t h, unsigned width, unsigned decPl
   return kOkRC;
 }
 
-cw::rc_t cw::textBuf::test()
+cw::rc_t cw::textBuf::test( const test::test_args_t& args )
 {
   handle_t h;
   rc_t rc;
@@ -175,7 +176,7 @@ cw::rc_t cw::textBuf::test()
   print(h,"Hello\n");
   print(h,"foo\n");
 
-  printf("%s", text(h) );
+  cwLogPrint("%s", text(h) );
 
   return destroy(h);
 }
diff --git a/cwTextBuf.h b/cwTextBuf.h
index 936aaf4..9bf899e 100644
--- a/cwTextBuf.h
+++ b/cwTextBuf.h
@@ -28,7 +28,7 @@ namespace cw
     rc_t setIntFormat( handle_t h, unsigned width, unsigned flags );
     rc_t setFloatFormat( handle_t h, unsigned width, unsigned decPlN );
 
-    rc_t test();
+    rc_t test( const test::test_args_t& args);
   }  
 }