diff --git a/test_regress/t/t_lib.pl b/test_regress/t/t_lib.pl
index ef6fcd3b2..de31f55b6 100755
--- a/test_regress/t/t_lib.pl
+++ b/test_regress/t/t_lib.pl
@@ -11,10 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(
-    vlt => 1,
-    xsim => 1,
-    );
+scenarios(vlt => 1, xsim => 1);
 
 top_filename("t/t_lib_prot.v");
 
diff --git a/test_regress/t/t_lib_nolib.pl b/test_regress/t/t_lib_nolib.pl
index 0a385f0cb..b463b16b6 100755
--- a/test_regress/t/t_lib_nolib.pl
+++ b/test_regress/t/t_lib_nolib.pl
@@ -11,10 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(
-    vlt => 1,
-    xsim => 1,
-    );
+scenarios(vlt => 1, xsim => 1);
 
 $Self->{sim_time} = $Self->{benchmark} * 100 if $Self->{benchmark};
 top_filename("t/t_lib_prot.v");
diff --git a/test_regress/t/t_lib_prot.pl b/test_regress/t/t_lib_prot.pl
index 14c01dc7c..dddc68012 100755
--- a/test_regress/t/t_lib_prot.pl
+++ b/test_regress/t/t_lib_prot.pl
@@ -11,10 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(
-    vlt => 1,
-    xsim => 1,
-    );
+scenarios(vlt => 1, xsim => 1);
 
 $Self->{sim_time} = $Self->{benchmark} * 100 if $Self->{benchmark};
 
diff --git a/test_regress/t/t_lib_prot_clk_gated.pl b/test_regress/t/t_lib_prot_clk_gated.pl
index b1286cca2..787f69ad9 100755
--- a/test_regress/t/t_lib_prot_clk_gated.pl
+++ b/test_regress/t/t_lib_prot_clk_gated.pl
@@ -11,10 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(
-    vlt => 1,
-    xsim => 1,
-    );
+scenarios(vlt => 1, xsim => 1);
 
 $Self->{sim_time} = $Self->{benchmark} * 100 if $Self->{benchmark};
 
diff --git a/test_regress/t/t_lib_prot_comb.pl b/test_regress/t/t_lib_prot_comb.pl
index 73cfd8aef..961af3799 100755
--- a/test_regress/t/t_lib_prot_comb.pl
+++ b/test_regress/t/t_lib_prot_comb.pl
@@ -11,10 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(
-    vlt => 1,
-    xsim => 1,
-    );
+scenarios(vlt => 1, xsim => 1);
 
 $Self->{sim_time} = $Self->{benchmark} * 100 if $Self->{benchmark};
 
diff --git a/test_regress/t/t_lib_prot_shared.pl b/test_regress/t/t_lib_prot_shared.pl
index b7fab1e92..02d95a9e7 100755
--- a/test_regress/t/t_lib_prot_shared.pl
+++ b/test_regress/t/t_lib_prot_shared.pl
@@ -11,11 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
-scenarios(
-    vlt => 1,
-    vltmt => 1,
-    xsim => 1,
-    );
+scenarios(vlt_all => 1, xsim => 1);
 top_filename("t/t_lib_prot.v");
 
 $Self->{sim_time} = $Self->{benchmark} * 100 if $Self->{benchmark};