Index: trunk/psLib/test/dataManip/tst_psMinimize04.c
===================================================================
--- trunk/psLib/test/dataManip/tst_psMinimize04.c	(revision 1953)
+++ trunk/psLib/test/dataManip/tst_psMinimize04.c	(revision 1976)
@@ -60,5 +60,5 @@
     printPositiveTestHeader(stdout,
                             "psMinimize functions",
-                            "psVectorFitPolynomial1D(): equal errors in yErr");
+                            "psVectorFitPolynomial1D(): equal difference in variable yErr");
 
     psVectorFitPolynomial1D(myPoly, x, y, yErr);
@@ -94,5 +94,5 @@
     printFooter(stdout,
                 "psMinimize functions",
-                "psVectorFitPolynomial1D(): equal errors in yErr",
+                "psVectorFitPolynomial1D(): equal differences in variable yErr",
                 testStatus);
 
@@ -227,4 +227,5 @@
     int testStatus = true;
     int memLeaks = 0;
+    psPolynomial1D *myPoly = NULL;
 
     printPositiveTestHeader(stdout,
@@ -232,5 +233,10 @@
                             "psVectorFitPolynomial1D(): all inputs are NULL");
 
-    psVectorFitPolynomial1D(NULL, NULL, NULL, NULL);
+    psLogMsg(__func__,PS_LOG_INFO,"Following should generate an error for null input polynomial.");
+    myPoly = psVectorFitPolynomial1D(NULL, NULL, NULL, NULL);
+    if ( myPoly != NULL ) {
+        psError(__func__,"A null polynomial should have returned a null pointer.");
+        testStatus = false;
+    }