diff --git a/test_regress/t/t_c_this.pl b/test_regress/t/t_c_this.pl
index b8edcffb4..93c3b5200 100755
--- a/test_regress/t/t_c_this.pl
+++ b/test_regress/t/t_c_this.pl
@@ -8,19 +8,28 @@ 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);
+scenarios(simulator => 1);
 
 compile();
 
 if ($Self->{vlt_all}) {
     # The word 'this' (but only the whole word 'this' should have been replaced
     # in the contents.
-    my $file = glob_one("$Self->{obj_dir}/$Self->{VM_PREFIX}___024root__DepSet_*__0.cpp");
-    my $text = file_contents($file);
-    error("$file has 'this->clk'") if ($text =~ m/\bthis->clk\b/);
-    error("$file does not have 'xthis'") if ($text !~ m/\bxthis\b/);
-    error("$file does not have 'thisx'") if ($text !~ m/\bthisx\b/);
-    error("$file does not have 'xthisx'") if ($text !~ m/\bxthisx\b/);
+    my $has_this   = 0;
+    my $has_xthis  = 0;
+    my $has_thisx  = 0;
+    my $has_xthisx = 0;
+    for my $file (glob_all("$Self->{obj_dir}/$Self->{VM_PREFIX}___024root__DepSet_*__0.cpp")) {
+        my $text = file_contents($file);
+        $has_this   = 1 if ($text =~ m/\bthis->clk\b/);
+        $has_xthis  = 1 if ($text =~ m/\bxthis\b/);
+        $has_thisx  = 1 if ($text =~ m/\bthisx\b/);
+        $has_xthisx = 1 if ($text =~ m/\bxthisx\b/);
+    }
+    error("Some file has 'this->clk'") if $has_this;
+    error("No file has 'xthis'") if !$has_xthis;
+    error("No file has 'thisx'") if !$has_thisx;
+    error("No file has 'xthisx'") if !$has_xthisx;
 }
 
 ok(1);
diff --git a/test_regress/t/t_event.v b/test_regress/t/t_event.v
index 0f5384c14..9bf376779 100644
--- a/test_regress/t/t_event.v
+++ b/test_regress/t/t_event.v
@@ -22,9 +22,9 @@ module t(/*AUTOARG*/
    event ev [3:0];
 `endif
 
-   int   cyc;
+   int   cyc = 0;
 
-   int last_event;
+   int last_event = 0;
    always @(e1) begin
       `WRITE_VERBOSE(("[%0t] e1\n", $time));
       if (!e1.triggered) $stop;
diff --git a/test_regress/t/t_order_multialways.v b/test_regress/t/t_order_multialways.v
index 63f75c5eb..65d500455 100644
--- a/test_regress/t/t_order_multialways.v
+++ b/test_regress/t/t_order_multialways.v
@@ -25,11 +25,11 @@ module t (/*AUTOARG*/
 
    // verilator lint_off UNOPTFLAT
    reg [31:0] e2,f2,g2,h2;
-   always @ (/*AS*/f2) begin
+   always @ (/*AS*/f2, g2) begin
       h2 = {g2[15:0], g2[31:16]};
       g2 = {f2[15:0], f2[31:16]};
    end
-   always @ (/*AS*/in_a) begin
+   always @ (/*AS*/in_a, e2) begin
       f2 = {e2[15:0], e2[31:16]};
       e2 = in_a;
    end