diff --git a/src/V3Number.cpp b/src/V3Number.cpp
index 85b61e913..3e139da99 100644
--- a/src/V3Number.cpp
+++ b/src/V3Number.cpp
@@ -27,7 +27,7 @@
 #include <cstdarg>
 #include <iomanip>
 
-#define MAX_SPRINTF_DOUBLE_SIZE 100  // Maximum characters with a sprintf %e/%f/%g (probably < 30)
+#define MAX_SPRINTF_DOUBLE_SIZE 1100  // Maximum characters with a sprintf %e/%f/%g (really 1079)
 
 // Number operations build output in-place so can't call e.g. foo.opX(foo)
 #define NUM_ASSERT_OP_ARGS1(arg1) \
diff --git a/test_regress/t/t_lint_comb_use.pl b/test_regress/t/t_lint_comb_use.pl
index 588f453b4..9c58f64a3 100755
--- a/test_regress/t/t_lint_comb_use.pl
+++ b/test_regress/t/t_lint_comb_use.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 lint(
     verilator_flags2 => ["--lint-only --bbox-sys"],
-    fails => 0,
     );
 
 ok(1);
diff --git a/test_regress/t/t_lint_unused.pl b/test_regress/t/t_lint_unused.pl
index b433dd82b..ab8a6023e 100755
--- a/test_regress/t/t_lint_unused.pl
+++ b/test_regress/t/t_lint_unused.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 lint(
     verilator_flags2 => ["--lint-only --bbox-sys --bbox-unsup -Wall -Wno-DECLFILENAME"],
-    fails => 0,
     );
 
 ok(1);
diff --git a/test_regress/t/t_lint_unused_iface.pl b/test_regress/t/t_lint_unused_iface.pl
index 3645f9162..3679f5264 100755
--- a/test_regress/t/t_lint_unused_iface.pl
+++ b/test_regress/t/t_lint_unused_iface.pl
@@ -12,7 +12,6 @@ scenarios(vlt => 1);
 
 lint(
     verilator_flags2 => ["--lint-only -Wall -Wno-DECLFILENAME"],
-    fails => 0,
     );
 
 ok(1);
diff --git a/test_regress/t/t_math_real.v b/test_regress/t/t_math_real.v
index 17bc0221c..167bd9fbf 100644
--- a/test_regress/t/t_math_real.v
+++ b/test_regress/t/t_math_real.v
@@ -85,6 +85,9 @@ module t (/*AUTOARG*/
       // bug
       r = 32'bxz000_111;  // 7 accoding to IEEE
       if (r != 7) $stop;
+      // bug
+      b = 64'h7fe8000000000000;
+      $display("%6.3f", $bitstoreal(b));
    end
 
    // Test loop
diff --git a/test_regress/t/t_trace_flag_off.pl b/test_regress/t/t_trace_flag_off.pl
index 681e3d644..32a214e08 100755
--- a/test_regress/t/t_trace_flag_off.pl
+++ b/test_regress/t/t_trace_flag_off.pl
@@ -16,7 +16,6 @@ compile(
 
 execute(
     expect_filename => $Self->{golden_filename},
-    fails => 0,
     );
 
 ok(1);