diff --git a/src/V3Ast.cpp b/src/V3Ast.cpp
index c99839962..d3ec378bb 100644
--- a/src/V3Ast.cpp
+++ b/src/V3Ast.cpp
@@ -1043,7 +1043,7 @@ void AstNode::dumpTreeFile(const string& filename, bool append, bool doDump) {
 	{   // Write log & close
 	    UINFO(2,"Dumping "<<filename<<endl);
             const vl_unique_ptr<std::ofstream> logsp (V3File::new_ofstream(filename, append));
-	    if (logsp->fail()) v3fatalSrc("Can't write "<<filename);
+            if (logsp->fail()) v3fatal("Can't write "<<filename);
             *logsp<<"Verilator Tree Dump (format 0x3900) from <e"<<std::dec<<editCountLast()<<">";
             *logsp<<" to <e"<<std::dec<<editCountGbl()<<">"<<endl;
 	    if (editCountGbl()==editCountLast()
diff --git a/src/V3Cdc.cpp b/src/V3Cdc.cpp
index b696c8b05..e9696886f 100644
--- a/src/V3Cdc.cpp
+++ b/src/V3Cdc.cpp
@@ -494,7 +494,7 @@ private:
 
 	string filename = v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__cdc_edges.txt";
         const vl_unique_ptr<std::ofstream> ofp (V3File::new_ofstream(filename));
-	if (ofp->fail()) v3fatalSrc("Can't write "<<filename);
+        if (ofp->fail()) v3fatal("Can't write "<<filename);
 	*ofp<<"Edge Report for "<<v3Global.opt.prefix()<<endl;
 
         std::deque<string> report;  // Sort output by name
@@ -736,7 +736,7 @@ public:
 	// Make report of all signal names and what clock edges they have
 	string filename = v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__cdc.txt";
 	m_ofp = V3File::new_ofstream(filename);
-	if (m_ofp->fail()) v3fatalSrc("Can't write "<<filename);
+        if (m_ofp->fail()) v3fatal("Can't write "<<filename);
 	m_ofFilename = filename;
 	*m_ofp<<"CDC Report for "<<v3Global.opt.prefix()<<endl;
 	*m_ofp<<"Each dump below traces logic from inputs/source flops to destination flop(s).\n";
diff --git a/src/V3File.cpp b/src/V3File.cpp
index 7e832892a..2116d4394 100644
--- a/src/V3File.cpp
+++ b/src/V3File.cpp
@@ -135,7 +135,7 @@ V3FileDependImp  dependImp;	// Depend implementation class
 
 inline void V3FileDependImp::writeDepend(const string& filename) {
     const vl_unique_ptr<std::ofstream> ofp (V3File::new_ofstream(filename));
-    if (ofp->fail()) v3fatalSrc("Can't write "<<filename);
+    if (ofp->fail()) v3fatal("Can't write "<<filename);
 
     for (std::set<DependFile>::iterator iter=m_filenameList.begin();
 	 iter!=m_filenameList.end(); ++iter) {
@@ -171,7 +171,7 @@ inline void V3FileDependImp::writeDepend(const string& filename) {
 
 inline void V3FileDependImp::writeTimes(const string& filename, const string& cmdlineIn) {
     const vl_unique_ptr<std::ofstream> ofp (V3File::new_ofstream(filename));
-    if (ofp->fail()) v3fatalSrc("Can't write "<<filename);
+    if (ofp->fail()) v3fatal("Can't write "<<filename);
 
     string cmdline = stripQuotes(cmdlineIn);
     *ofp<<"# DESCR"<<"IPTION: Verilator output: Timestamp data for --skip-identical.  Delete at will."<<endl;
diff --git a/src/V3Graph.cpp b/src/V3Graph.cpp
index c29751677..64786264a 100644
--- a/src/V3Graph.cpp
+++ b/src/V3Graph.cpp
@@ -306,7 +306,7 @@ void V3Graph::dumpDotFile(const string& filename, bool colorAsSubgraph) const {
     // This generates a file used by graphviz, http://www.graphviz.org
     // "hardcoded" parameters:
     const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(filename));
-    if (logp->fail()) v3fatalSrc("Can't write "<<filename);
+    if (logp->fail()) v3fatal("Can't write "<<filename);
 
     // Header
     *logp<<"digraph v3graph {\n";
diff --git a/src/V3Hashed.cpp b/src/V3Hashed.cpp
index 4069acaa4..a32193467 100644
--- a/src/V3Hashed.cpp
+++ b/src/V3Hashed.cpp
@@ -153,7 +153,7 @@ void V3Hashed::dumpFilePrefixed(const string& nameComment, bool tree) {
 
 void V3Hashed::dumpFile(const string& filename, bool tree) {
     const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(filename));
-    if (logp->fail()) v3fatalSrc("Can't write "<<filename);
+    if (logp->fail()) v3fatal("Can't write "<<filename);
 
     std::map<int,int> dist;
 
diff --git a/src/V3LinkDot.cpp b/src/V3LinkDot.cpp
index 44ff76aa4..550ea2f9c 100644
--- a/src/V3LinkDot.cpp
+++ b/src/V3LinkDot.cpp
@@ -134,7 +134,7 @@ public:
 	if (debug()>=6 || force) {
 	    string filename = v3Global.debugFilename(nameComment)+".txt";
             const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(filename));
-	    if (logp->fail()) v3fatalSrc("Can't write "<<filename);
+            if (logp->fail()) v3fatal("Can't write "<<filename);
             std::ostream& os = *logp;
 	    m_syms.dump(os);
 	    bool first = true;
diff --git a/src/V3Order.cpp b/src/V3Order.cpp
index ac98faa97..af604e891 100644
--- a/src/V3Order.cpp
+++ b/src/V3Order.cpp
@@ -1501,7 +1501,7 @@ void OrderVisitor::processEdgeReport() {
     // Make report of all signal names and what clock edges they have
     string filename = v3Global.debugFilename("order_edges.txt");
     const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(filename));
-    if (logp->fail()) v3fatalSrc("Can't write "<<filename);
+    if (logp->fail()) v3fatal("Can't write "<<filename);
     //Testing emitter: V3EmitV::verilogForTree(v3Global.rootp(), *logp);
 
     std::deque<string> report;
@@ -1776,7 +1776,7 @@ void OrderVisitor::process() {
     if (0 && debug()) {
 	string dfilename = v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"_INT_order";
         const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(dfilename));
-	if (logp->fail()) v3fatalSrc("Can't write "<<dfilename);
+        if (logp->fail()) v3fatal("Can't write "<<dfilename);
 	m_graph.dump(*logp);
     }
 }
diff --git a/src/V3StatsReport.cpp b/src/V3StatsReport.cpp
index 3856c7041..056874215 100644
--- a/src/V3StatsReport.cpp
+++ b/src/V3StatsReport.cpp
@@ -244,7 +244,7 @@ void V3Stats::statsReport() {
     // Open stats file
     string filename = v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__stats.txt";
     std::ofstream* ofp (V3File::new_ofstream(filename));
-    if (ofp->fail()) v3fatalSrc("Can't write "<<filename);
+    if (ofp->fail()) v3fatal("Can't write "<<filename);
 
     StatsReport reporter (ofp);
 
diff --git a/src/V3SymTable.h b/src/V3SymTable.h
index 328563523..d83132540 100644
--- a/src/V3SymTable.h
+++ b/src/V3SymTable.h
@@ -284,7 +284,7 @@ public:
 	    string filename = v3Global.debugFilename(nameComment)+".txt";
 	    UINFO(2,"Dumping "<<filename<<endl);
             const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(filename));
-	    if (logp->fail()) v3fatalSrc("Can't write "<<filename);
+            if (logp->fail()) v3fatal("Can't write "<<filename);
 	    dump(*logp, "");
 	}
     }
diff --git a/src/V3TSP.cpp b/src/V3TSP.cpp
index 085187cc6..d8bea48ec 100644
--- a/src/V3TSP.cpp
+++ b/src/V3TSP.cpp
@@ -385,7 +385,7 @@ public:
         if (v3Global.opt.dumpTree()) {
             string filename = v3Global.debugFilename(nameComment)+".txt";
             const vl_unique_ptr<std::ofstream> logp(V3File::new_ofstream(filename));
-            if (logp->fail()) v3fatalSrc("Can't write "<<filename);
+            if (logp->fail()) v3fatal("Can't write "<<filename);
             dumpGraph(*logp, nameComment);
         }
     }
diff --git a/test_regress/driver.pl b/test_regress/driver.pl
index b9cabbf4e..2c05e2951 100755
--- a/test_regress/driver.pl
+++ b/test_regress/driver.pl
@@ -591,7 +591,6 @@ sub compile_vlt_flags {
     my @verilator_flags = @{$param{verilator_flags}};
     unshift @verilator_flags, "--gdb" if $opt_gdb;
     unshift @verilator_flags, "--gdbbt" if $opt_gdbbt;
-    unshift @verilator_flags, @Opt_Driver_Verilator_Flags;
     unshift @verilator_flags, "--x-assign unique";  # More likely to be buggy
     unshift @verilator_flags, "--trace" if $opt_trace;
     if (defined $opt_optimize) {
@@ -615,6 +614,9 @@ sub compile_vlt_flags {
 		   @{$param{verilator_flags3}},
 		   @{$param{v_flags}},
 		   @{$param{v_flags2}},
+                   # Flags from driver cmdline override default flags and
+                   # flags from the test itself
+                   @Opt_Driver_Verilator_Flags,
 		   $param{top_filename},
 		   @{$param{v_other_filenames}},
 		   ($param{stdout_filename}?"> ".$param{stdout_filename}:""),