diff --git a/test_regress/driver.pl b/test_regress/driver.pl
index 6bc4172de..7c7e5692d 100755
--- a/test_regress/driver.pl
+++ b/test_regress/driver.pl
@@ -910,6 +910,19 @@ sub clean_objs {
     system("rm", "-rf", glob("$self->{obj_dir}/*"));
 }
 
+sub _checkflags {
+    my $self = shift;
+    my %param = (@_);
+    my $checkflags = (' '.join(' ',
+                               @{$param{v_flags}},
+                               @{$param{v_flags2}},
+                               @{$param{verilator_flags}},
+                               @{$param{verilator_flags2}},
+                               @{$param{verilator_flags3}})
+                      .' ');
+    return $checkflags;
+}
+
 sub compile_vlt_cmd {
     my $self = (ref $_[0] ? shift : $Self);
     my %param = (%{$self},  # Default arguments are from $self
@@ -918,7 +931,7 @@ sub compile_vlt_cmd {
 
     my @vlt_cmd = (
         "perl", "$ENV{VERILATOR_ROOT}/bin/verilator",
-        $self->compile_vlt_flags(%param),
+        $self->_compile_vlt_flags(%param),
         $param{top_filename},
         @{$param{v_other_filenames}},
         $param{stdout_filename} ? "> " . $param{stdout_filename} : ""
@@ -926,19 +939,12 @@ sub compile_vlt_cmd {
     return @vlt_cmd;
 }
 
-sub compile_vlt_flags {
-    my $self = (ref $_[0] ? shift : $Self);
-    my %param = (%{$self},  # Default arguments are from $self
-                 @_);  # Supports arbitrary arguments
+sub _compile_vlt_flags {
+    my $self = shift;
+    my %param = (@_);  # Supports arbitrary arguments from compile_vlt_cmd
     return 1 if $self->errors || $self->skips;
 
-    my $checkflags = (' '.join(' ',
-                               @{$param{v_flags}},
-                               @{$param{v_flags2}},
-                               @{$param{verilator_flags}},
-                               @{$param{verilator_flags2}},
-                               @{$param{verilator_flags3}})
-                      .' ');
+    my $checkflags = $self->_checkflags(%param);
     die "%Error: specify threads via 'threads =>' argument, not as a command line option" unless ($checkflags !~ /(^|\s)-?-threads\s/);
     $self->{coverage} = 1 if ($checkflags =~ /-coverage\b/);
     $self->{savable} = 1 if ($checkflags =~ /-savable\b/);
@@ -1013,12 +1019,15 @@ sub compile {
 
     die "%Error: 'threads =>' argument must be <= 1 for vlt scenario" if $param{vlt} && $param{threads} > 1;
     # Compute automatic parameter values
+    my $checkflags = $self->_checkflags(%param);
     $param{threads} = ::calc_threads($Vltmt_threads) if $param{threads} < 0 && $param{vltmt};
     $param{context_threads} = $param{threads} >= 1 ? $param{threads} : 1 if !$param{context_threads};
+    $param{make_main} = 0 if ($checkflags =~ / -?-main\b/ || $checkflags =~ / -?-binary\b/);
+
     $self->{threads} = $param{threads};
     $self->{context_threads} = $param{context_threads};
 
-    compile_vlt_cmd(%param);
+    $self->compile_vlt_cmd(%param);
 
     my $define_opt = defineOpt($self->{xsim});
     if (join(' ', @{$self->{v_flags}}) !~ /TEST_DUMPFILE/) {
@@ -1188,7 +1197,7 @@ sub compile {
         }
 
         if ($param{verilator_make_cmake}) {
-            my @vlt_args = $self->compile_vlt_flags(%param);
+            my @vlt_args = $self->_compile_vlt_flags(%param);
             $self->oprint("Running cmake\n") if $self->{verbose};
             mkdir $self->{obj_dir};
             my @csources = ();
diff --git a/test_regress/t/t_assigndly_dynamic.pl b/test_regress/t/t_assigndly_dynamic.pl
index 3576e3ffb..270c8b710 100755
--- a/test_regress/t/t_assigndly_dynamic.pl
+++ b/test_regress/t/t_assigndly_dynamic.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
@@ -21,7 +20,6 @@ execute(
 
 compile(
     verilator_flags2 => ["--exe --main --timing +define+WITH_DELAY"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_clocking_empty_block.pl b/test_regress/t/t_clocking_empty_block.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_clocking_empty_block.pl
+++ b/test_regress/t/t_clocking_empty_block.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_clocking_timing1.pl b/test_regress/t/t_clocking_timing1.pl
index 671334c7d..fbcaf794f 100755
--- a/test_regress/t/t_clocking_timing1.pl
+++ b/test_regress/t/t_clocking_timing1.pl
@@ -14,7 +14,6 @@ top_filename("t/t_clocking_timing.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_clocking_timing2.pl b/test_regress/t/t_clocking_timing2.pl
index ad6f5308f..d5e2d9864 100755
--- a/test_regress/t/t_clocking_timing2.pl
+++ b/test_regress/t/t_clocking_timing2.pl
@@ -14,7 +14,6 @@ top_filename("t/t_clocking_timing.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing -DTEST_INPUT_SKEW=12 -DTEST_OUTPUT_SKEW=16"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_cxx_equal_to.pl b/test_regress/t/t_cxx_equal_to.pl
index efd6274f5..d0f124208 100755
--- a/test_regress/t/t_cxx_equal_to.pl
+++ b/test_regress/t/t_cxx_equal_to.pl
@@ -16,7 +16,6 @@ compile(
     verilator_flags2 => ['--binary --timing --trace'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_delay_var.pl b/test_regress/t/t_delay_var.pl
index 0b10f155d..c8f2eacfe 100755
--- a/test_regress/t/t_delay_var.pl
+++ b/test_regress/t/t_delay_var.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_disable_fork1.pl b/test_regress/t/t_disable_fork1.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_disable_fork1.pl
+++ b/test_regress/t/t_disable_fork1.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_disable_fork2.pl b/test_regress/t/t_disable_fork2.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_disable_fork2.pl
+++ b/test_regress/t/t_disable_fork2.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_disable_fork3.pl b/test_regress/t/t_disable_fork3.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_disable_fork3.pl
+++ b/test_regress/t/t_disable_fork3.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_display_impure.pl b/test_regress/t/t_display_impure.pl
index 61f6d3396..576ac0d3d 100755
--- a/test_regress/t/t_display_impure.pl
+++ b/test_regress/t/t_display_impure.pl
@@ -12,7 +12,6 @@ scenarios(linter => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_event_control_pass.pl b/test_regress/t/t_event_control_pass.pl
index 2f8329791..0cb201e30 100755
--- a/test_regress/t/t_event_control_pass.pl
+++ b/test_regress/t/t_event_control_pass.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     threads => 1,
     );
 
diff --git a/test_regress/t/t_flag_binary.pl b/test_regress/t/t_flag_binary.pl
index e810b1eb6..bf2dc801d 100755
--- a/test_regress/t/t_flag_binary.pl
+++ b/test_regress/t/t_flag_binary.pl
@@ -19,7 +19,6 @@ compile(
     verilator_flags2 => ['--binary'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_flag_main.pl b/test_regress/t/t_flag_main.pl
index 57041562f..f279e8a2e 100755
--- a/test_regress/t/t_flag_main.pl
+++ b/test_regress/t/t_flag_main.pl
@@ -17,7 +17,6 @@ compile(
     verilator_flags2 => ['--exe --build --main'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     # Check that code --main produces uses only most modern API features
     make_flags => 'CPPFLAGS_ADD=-DVL_NO_LEGACY',
     );
diff --git a/test_regress/t/t_flag_main_sc_bad.pl b/test_regress/t/t_flag_main_sc_bad.pl
index 8c8eb97ca..94fd1dce7 100755
--- a/test_regress/t/t_flag_main_sc_bad.pl
+++ b/test_regress/t/t_flag_main_sc_bad.pl
@@ -14,7 +14,6 @@ compile(
     verilator_flags2 => ['--exe --build --main --sc'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     fails => 1,
     expect_filename => $Self->{golden_filename},
     );
diff --git a/test_regress/t/t_flag_prefix.pl b/test_regress/t/t_flag_prefix.pl
index adcce742d..940ddc16b 100755
--- a/test_regress/t/t_flag_prefix.pl
+++ b/test_regress/t/t_flag_prefix.pl
@@ -16,7 +16,6 @@ compile(
                          "--exe", "--main", "--stats", "--build"],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_fork_block_item_declaration.pl b/test_regress/t/t_fork_block_item_declaration.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_fork_block_item_declaration.pl
+++ b/test_regress/t/t_fork_block_item_declaration.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_fork_dynscope.pl b/test_regress/t/t_fork_dynscope.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_fork_dynscope.pl
+++ b/test_regress/t/t_fork_dynscope.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_fork_initial.pl b/test_regress/t/t_fork_initial.pl
index c78ec8a58..7751e4fe8 100755
--- a/test_regress/t/t_fork_initial.pl
+++ b/test_regress/t/t_fork_initial.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     # issue #4471 - remove this
     verilator_make_gmake => 0,
     );
diff --git a/test_regress/t/t_fork_join_none_class_cap.pl b/test_regress/t/t_fork_join_none_class_cap.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_fork_join_none_class_cap.pl
+++ b/test_regress/t/t_fork_join_none_class_cap.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_fork_jumpblock.pl b/test_regress/t/t_fork_jumpblock.pl
index bc632ee01..a1cdcff37 100755
--- a/test_regress/t/t_fork_jumpblock.pl
+++ b/test_regress/t/t_fork_jumpblock.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_fork_none_var.pl b/test_regress/t/t_fork_none_var.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_fork_none_var.pl
+++ b/test_regress/t/t_fork_none_var.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_fork_output_arg.pl b/test_regress/t/t_fork_output_arg.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_fork_output_arg.pl
+++ b/test_regress/t/t_fork_output_arg.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_interface_virtual_timing.pl b/test_regress/t/t_interface_virtual_timing.pl
index 0da9620d1..30ef08a9e 100755
--- a/test_regress/t/t_interface_virtual_timing.pl
+++ b/test_regress/t/t_interface_virtual_timing.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_jumps_uninit_destructor_call.pl b/test_regress/t/t_jumps_uninit_destructor_call.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_jumps_uninit_destructor_call.pl
+++ b/test_regress/t/t_jumps_uninit_destructor_call.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_lint_infinite.pl b/test_regress/t/t_lint_infinite.pl
index 3364f1ed7..7964ebe90 100755
--- a/test_regress/t/t_lint_infinite.pl
+++ b/test_regress/t/t_lint_infinite.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_mailbox.pl b/test_regress/t/t_mailbox.pl
index 30306c8ce..41f6e2a53 100755
--- a/test_regress/t/t_mailbox.pl
+++ b/test_regress/t/t_mailbox.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wall"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_mailbox_notiming.pl b/test_regress/t/t_mailbox_notiming.pl
index fb7f3e881..70368f851 100755
--- a/test_regress/t/t_mailbox_notiming.pl
+++ b/test_regress/t/t_mailbox_notiming.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --no-timing -Wall"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_mailbox_std.pl b/test_regress/t/t_mailbox_std.pl
index 31b9a5203..8f575f2f2 100755
--- a/test_regress/t/t_mailbox_std.pl
+++ b/test_regress/t/t_mailbox_std.pl
@@ -14,7 +14,6 @@ top_filename("t/t_mailbox.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wall --Wpedantic -DMAILBOX_T=std::mailbox"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_mailbox_unbounded.pl b/test_regress/t/t_mailbox_unbounded.pl
index 30306c8ce..41f6e2a53 100755
--- a/test_regress/t/t_mailbox_unbounded.pl
+++ b/test_regress/t/t_mailbox_unbounded.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wall"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_process_propagation.pl b/test_regress/t/t_process_propagation.pl
index 3364f1ed7..7964ebe90 100755
--- a/test_regress/t/t_process_propagation.pl
+++ b/test_regress/t/t_process_propagation.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_process_task.pl b/test_regress/t/t_process_task.pl
index 123e2f4fd..ef9cff8c5 100755
--- a/test_regress/t/t_process_task.pl
+++ b/test_regress/t/t_process_task.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     v_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_semaphore.pl b/test_regress/t/t_semaphore.pl
index 30306c8ce..41f6e2a53 100755
--- a/test_regress/t/t_semaphore.pl
+++ b/test_regress/t/t_semaphore.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wall"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_semaphore_std.pl b/test_regress/t/t_semaphore_std.pl
index 47041497b..39236c3d4 100755
--- a/test_regress/t/t_semaphore_std.pl
+++ b/test_regress/t/t_semaphore_std.pl
@@ -14,7 +14,6 @@ top_filename("t/t_semaphore.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wall -DSEMAPHORE_T=std::semaphore"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_stack_check.pl b/test_regress/t/t_stack_check.pl
index 8c196698f..0c61fa4eb 100755
--- a/test_regress/t/t_stack_check.pl
+++ b/test_regress/t/t_stack_check.pl
@@ -14,7 +14,6 @@ compile(
     verilator_flags2 => ['--binary --debug-stack-check'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute();
diff --git a/test_regress/t/t_std_process_self.pl b/test_regress/t/t_std_process_self.pl
index 5b73c5ff4..80841859b 100755
--- a/test_regress/t/t_std_process_self.pl
+++ b/test_regress/t/t_std_process_self.pl
@@ -12,12 +12,10 @@ scenarios(simulator => 1);
 
 lint(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 lint(
     verilator_flags2 => ["--exe --main --timing --DUSE_STD_PREFIX"],
-    make_main => 0,
     );
 
 ok(1);
diff --git a/test_regress/t/t_stream5.pl b/test_regress/t/t_stream5.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_stream5.pl
+++ b/test_regress/t/t_stream5.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_time.pl b/test_regress/t/t_time.pl
index 0db50fc52..47728df81 100755
--- a/test_regress/t/t_time.pl
+++ b/test_regress/t/t_time.pl
@@ -12,7 +12,6 @@ scenarios(linter => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_always.pl b/test_regress/t/t_timing_always.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_always.pl
+++ b/test_regress/t/t_timing_always.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_class.pl b/test_regress/t/t_timing_class.pl
index 002312d88..ed3bac458 100755
--- a/test_regress/t/t_timing_class.pl
+++ b/test_regress/t/t_timing_class.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_class_static_delay.pl b/test_regress/t/t_timing_class_static_delay.pl
index 002312d88..ed3bac458 100755
--- a/test_regress/t/t_timing_class_static_delay.pl
+++ b/test_regress/t/t_timing_class_static_delay.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_clkgen1.pl b/test_regress/t/t_timing_clkgen1.pl
index edbe747b4..a4a48a187 100755
--- a/test_regress/t/t_timing_clkgen1.pl
+++ b/test_regress/t/t_timing_clkgen1.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wno-MINTYPMAXDLY"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_clkgen2.pl b/test_regress/t/t_timing_clkgen2.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_clkgen2.pl
+++ b/test_regress/t/t_timing_clkgen2.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_clkgen3.pl b/test_regress/t/t_timing_clkgen3.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_clkgen3.pl
+++ b/test_regress/t/t_timing_clkgen3.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_debug1.pl b/test_regress/t/t_timing_debug1.pl
index 06be36082..61ae92cc7 100755
--- a/test_regress/t/t_timing_debug1.pl
+++ b/test_regress/t/t_timing_debug1.pl
@@ -14,7 +14,6 @@ top_filename("t/t_timing_sched.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_debug2.pl b/test_regress/t/t_timing_debug2.pl
index 4ff0b44ea..aa8ec9485 100755
--- a/test_regress/t/t_timing_debug2.pl
+++ b/test_regress/t/t_timing_debug2.pl
@@ -14,7 +14,6 @@ top_filename("t/t_timing_class.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_delay_callstack.pl b/test_regress/t/t_timing_delay_callstack.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_delay_callstack.pl
+++ b/test_regress/t/t_timing_delay_callstack.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_dlyassign.pl b/test_regress/t/t_timing_dlyassign.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_dlyassign.pl
+++ b/test_regress/t/t_timing_dlyassign.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_dynscope.pl b/test_regress/t/t_timing_dynscope.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_dynscope.pl
+++ b/test_regress/t/t_timing_dynscope.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_events.pl b/test_regress/t/t_timing_events.pl
index 002312d88..ed3bac458 100755
--- a/test_regress/t/t_timing_events.pl
+++ b/test_regress/t/t_timing_events.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_comb.pl b/test_regress/t/t_timing_fork_comb.pl
index ac0e116ba..c9e9158e8 100755
--- a/test_regress/t/t_timing_fork_comb.pl
+++ b/test_regress/t/t_timing_fork_comb.pl
@@ -20,7 +20,6 @@ compile(
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wno-UNOPTFLAT"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_join.pl b/test_regress/t/t_timing_fork_join.pl
index 3feb337e3..f686c3eec 100755
--- a/test_regress/t/t_timing_fork_join.pl
+++ b/test_regress/t/t_timing_fork_join.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_join_forkproc.pl b/test_regress/t/t_timing_fork_join_forkproc.pl
index 61664fabe..e6d59ea75 100755
--- a/test_regress/t/t_timing_fork_join_forkproc.pl
+++ b/test_regress/t/t_timing_fork_join_forkproc.pl
@@ -14,7 +14,6 @@ top_filename("t/t_timing_fork_join.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing --ftaskify-all-forked"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_many.pl b/test_regress/t/t_timing_fork_many.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_fork_many.pl
+++ b/test_regress/t/t_timing_fork_many.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_no_timing_ctrl.pl b/test_regress/t/t_timing_fork_no_timing_ctrl.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_fork_no_timing_ctrl.pl
+++ b/test_regress/t/t_timing_fork_no_timing_ctrl.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_rec_method.pl b/test_regress/t/t_timing_fork_rec_method.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_fork_rec_method.pl
+++ b/test_regress/t/t_timing_fork_rec_method.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_fork_taskcall.pl b/test_regress/t/t_timing_fork_taskcall.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_fork_taskcall.pl
+++ b/test_regress/t/t_timing_fork_taskcall.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_intra_assign.pl b/test_regress/t/t_timing_intra_assign.pl
index fabe5ebc4..f625618ab 100755
--- a/test_regress/t/t_timing_intra_assign.pl
+++ b/test_regress/t/t_timing_intra_assign.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wno-UNOPTFLAT"],
-    make_main => 0,
     );
 
 execute(
@@ -22,7 +21,6 @@ execute(
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wno-UNOPTFLAT -fno-localize"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_long.pl b/test_regress/t/t_timing_long.pl
index 834a8c4f5..2c5c9595e 100755
--- a/test_regress/t/t_timing_long.pl
+++ b/test_regress/t/t_timing_long.pl
@@ -59,7 +59,6 @@ if ($Self->have_coroutines) {
         verilator_flags2 => ["--exe --build --main --tim" . "ing"],
         verilator_make_cmake => 0,
         verilator_make_gmake => 0,
-        make_main => 0,
         make_top => 1,
         );
 
@@ -72,7 +71,6 @@ compile(
     verilator_flags2 => ["--exe --build --main --no-timing -Wno-STMTDLY"],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     make_top => 1,
     );
 
diff --git a/test_regress/t/t_timing_nba.pl b/test_regress/t/t_timing_nba.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_nba.pl
+++ b/test_regress/t/t_timing_nba.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_off.pl b/test_regress/t/t_timing_off.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_off.pl
+++ b/test_regress/t/t_timing_off.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_pong.pl b/test_regress/t/t_timing_pong.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_pong.pl
+++ b/test_regress/t/t_timing_pong.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_protect.pl b/test_regress/t/t_timing_protect.pl
index bd2ed322d..84a4c7ce0 100755
--- a/test_regress/t/t_timing_protect.pl
+++ b/test_regress/t/t_timing_protect.pl
@@ -19,7 +19,6 @@ else {
     compile(
         verilator_flags2 => ["--exe --main --timing --protect-ids",
                              "--protect-key SECRET_KEY"],
-        make_main => 0,
         );
 
     execute(
diff --git a/test_regress/t/t_timing_reentry.pl b/test_regress/t/t_timing_reentry.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_reentry.pl
+++ b/test_regress/t/t_timing_reentry.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_sched.pl b/test_regress/t/t_timing_sched.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_sched.pl
+++ b/test_regress/t/t_timing_sched.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_sched_if.pl b/test_regress/t/t_timing_sched_if.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_sched_if.pl
+++ b/test_regress/t/t_timing_sched_if.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_sched_nba.pl b/test_regress/t/t_timing_sched_nba.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_sched_nba.pl
+++ b/test_regress/t/t_timing_sched_nba.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_strobe.pl b/test_regress/t/t_timing_strobe.pl
index 3feb337e3..f686c3eec 100755
--- a/test_regress/t/t_timing_strobe.pl
+++ b/test_regress/t/t_timing_strobe.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_timescale.pl b/test_regress/t/t_timing_timescale.pl
index 3feb337e3..f686c3eec 100755
--- a/test_regress/t/t_timing_timescale.pl
+++ b/test_regress/t/t_timing_timescale.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_trace.pl b/test_regress/t/t_timing_trace.pl
index 73c643cee..e968634de 100755
--- a/test_regress/t/t_timing_trace.pl
+++ b/test_regress/t/t_timing_trace.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing --trace -Wno-MINTYPMAXDLY"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_trace_fst.pl b/test_regress/t/t_timing_trace_fst.pl
index 261ee5e84..2e8d5f1f5 100755
--- a/test_regress/t/t_timing_trace_fst.pl
+++ b/test_regress/t/t_timing_trace_fst.pl
@@ -14,7 +14,6 @@ top_filename("t/t_timing_trace.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing --trace-fst -Wno-MINTYPMAXDLY"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_wait1.pl b/test_regress/t/t_timing_wait1.pl
index 3508f0a14..3f4a19511 100755
--- a/test_regress/t/t_timing_wait1.pl
+++ b/test_regress/t/t_timing_wait1.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing -Wno-WAITCONST"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_wait2.pl b/test_regress/t/t_timing_wait2.pl
index 3feb337e3..f686c3eec 100755
--- a/test_regress/t/t_timing_wait2.pl
+++ b/test_regress/t/t_timing_wait2.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_wait3.pl b/test_regress/t/t_timing_wait3.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_timing_wait3.pl
+++ b/test_regress/t/t_timing_wait3.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_wait_long.pl b/test_regress/t/t_timing_wait_long.pl
index 3feb337e3..f686c3eec 100755
--- a/test_regress/t/t_timing_wait_long.pl
+++ b/test_regress/t/t_timing_wait_long.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_zerodly.pl b/test_regress/t/t_timing_zerodly.pl
index bbc99cfb6..9d615c1c3 100755
--- a/test_regress/t/t_timing_zerodly.pl
+++ b/test_regress/t/t_timing_zerodly.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_timing_zerodly_unsup.pl b/test_regress/t/t_timing_zerodly_unsup.pl
index 2d852adb1..5439c7838 100755
--- a/test_regress/t/t_timing_zerodly_unsup.pl
+++ b/test_regress/t/t_timing_zerodly_unsup.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_trace_binary.pl b/test_regress/t/t_trace_binary.pl
index 8304613d5..321b41ed5 100755
--- a/test_regress/t/t_trace_binary.pl
+++ b/test_regress/t/t_trace_binary.pl
@@ -17,7 +17,6 @@ compile(
     verilator_flags2 => ['--binary --trace'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_trace_binary_flag_off.pl b/test_regress/t/t_trace_binary_flag_off.pl
index 6de81c2ca..4a099bdc7 100755
--- a/test_regress/t/t_trace_binary_flag_off.pl
+++ b/test_regress/t/t_trace_binary_flag_off.pl
@@ -19,7 +19,6 @@ compile(
     verilator_flags2 => ['--binary'],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_trace_param_override.pl b/test_regress/t/t_trace_param_override.pl
index 4e2cf6e81..51a8874fe 100755
--- a/test_regress/t/t_trace_param_override.pl
+++ b/test_regress/t/t_trace_param_override.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --trace -GPOVERRODE=31"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_trace_ub_misaligned_address.pl b/test_regress/t/t_trace_ub_misaligned_address.pl
index 83dcf0fb4..bc08c02fe 100755
--- a/test_regress/t/t_trace_ub_misaligned_address.pl
+++ b/test_regress/t/t_trace_ub_misaligned_address.pl
@@ -18,7 +18,6 @@ compile(
                          "-LDFLAGS -fsanitize=address,undefined"],
     verilator_make_cmake => 0,
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_var_extern_method_lifetime.pl b/test_regress/t/t_var_extern_method_lifetime.pl
index b8493bd06..929ae897c 100755
--- a/test_regress/t/t_var_extern_method_lifetime.pl
+++ b/test_regress/t/t_var_extern_method_lifetime.pl
@@ -12,7 +12,6 @@ scenarios(simulator => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_virtual_interface_method.pl b/test_regress/t/t_virtual_interface_method.pl
index 2d5085be1..9a53332e0 100755
--- a/test_regress/t/t_virtual_interface_method.pl
+++ b/test_regress/t/t_virtual_interface_method.pl
@@ -13,7 +13,6 @@ scenarios(simulator => 1);
 compile(
     v_flags2 => ["--binary"],
     verilator_make_gmake => 0,
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_vlt_timing.pl b/test_regress/t/t_vlt_timing.pl
index d816239d3..78679cf79 100755
--- a/test_regress/t/t_vlt_timing.pl
+++ b/test_regress/t/t_vlt_timing.pl
@@ -14,7 +14,6 @@ top_filename("t/t_timing_off.v");
 
 compile(
     verilator_flags2 => ["--exe --main --timing t/t_vlt_timing.vlt"],
-    make_main => 0,
     );
 
 execute(
diff --git a/test_regress/t/t_wait_fork.pl b/test_regress/t/t_wait_fork.pl
index 0db50fc52..47728df81 100755
--- a/test_regress/t/t_wait_fork.pl
+++ b/test_regress/t/t_wait_fork.pl
@@ -12,7 +12,6 @@ scenarios(linter => 1);
 
 compile(
     verilator_flags2 => ["--exe --main --timing"],
-    make_main => 0,
     );
 
 execute(