diff --git a/Libtmp/Transform-Proj4/t/proj_transform.t b/Libtmp/Transform-Proj4/t/proj_transform.t
index 7d2a8b574..7afcec572 100644
--- a/Libtmp/Transform-Proj4/t/proj_transform.t
+++ b/Libtmp/Transform-Proj4/t/proj_transform.t
@@ -2,59 +2,51 @@ use strict;
 use warnings;
 use PDL::LiteF;
 use Test::More;
+use Test::PDL;
 use PDL::Transform::Proj4;
 use PDL::Transform::Cartography;
 
-sub pdl_cmp {
-  my ($g, $e, $l, $eps) = @_;
-  $_ = PDL->topdl($_) for $g, $e;
-  local $Test::Builder::Level = $Test::Builder::Level + 1;
-  my $res = all(approx($g, $e, $eps));
-  fail("$l: result was BAD value"), return if $res->isbad;
-  ok $res, $l or diag "got:\n$g\nexpected:\n$e";
-}
-
 my $fwd = pdl '-146.25 -81.5625; -137.8125 -81.5625; -146.25 -73.125; -137.8125 -73.125';
 my $inv = pdl '0 -7213503; 4809002 -7213503; 0 -4809002; 4809002 -4809002';
 my $t = t_proj( proj_params => "+proj=eqc +lon_0=0 +datum=WGS84" );
-pdl_cmp $fwd->apply($t), pdl(<<'EOF'), 'eqc fwd', 10;
+is_pdl $fwd->apply($t), pdl(<<'EOF'), {test_name=>'eqc fwd', atol=>10};
 -16280476 -9079496; -15341217 -9079496;
 -16280476 -8140237.8; -15341217 -8140237.8
 EOF
-pdl_cmp $inv->apply(!$t), pdl(<<'EOF'), 'eqc inv', 1e-2;
+is_pdl $inv->apply(!$t), pdl(<<'EOF'), {test_name=>'eqc inv', atol=>1e-2};
 0 -64.8; 43.2 -64.8; 0 -43.2; 43.2 -43.2
 EOF
 
 $fwd = pdl '-146.25 81.5625; -137.8125 81.5625; -146.25 73.125; -137.8125 73.125';
 $inv = pdl '0 -4558236.1; 1530752.9 -4558236.1; 0 -3031095.5; 1530752.9 -3031095.5';
 $t = t_proj( proj_params => "+proj=ortho +ellps=WGS84 +lon_0=-90 +lat_0=40" );
-pdl_cmp $fwd->apply($t), pdl(<<'EOF'), 'ortho fwd', 10;
+is_pdl $fwd->apply($t), pdl(<<'EOF'), {test_name=>'ortho fwd', atol=>10};
 -780706.14 4502242.5; -695714.05 4432238.3;
 -1544186 4016381.2; -1376077.2 3877917.4
 EOF
-pdl_cmp $inv->apply(!$t), pdl(<<'EOF'), 'ortho inv', 1e-2;
+is_pdl $inv->apply(!$t), pdl(<<'EOF'), {test_name=>'ortho inv', atol=>1e-2};
 -90 -5.9283617; -75.991258 -7.5230948; -90 11.481088; -75.886486 10.220222
 EOF
 
 $fwd = pdl '-146.25 81.5625; -137.8125 81.5625; -146.25 73.125; -137.8125 73.125';
 $inv = pdl '0 -4558236.1; 1530752.9 -4558236.1; 0 -3031095.5; 1530752.9 -3031095.5';
 $t = t_proj_ortho( ellps => 'WGS84', lon_0 => -90, lat_0 => 40 );
-pdl_cmp $fwd->apply($t), pdl(<<'EOF'), 'ortho2 fwd', 10;
+is_pdl $fwd->apply($t), pdl(<<'EOF'), {test_name=>'ortho2 fwd', atol=>10};
 -780706.14 4502242.5; -695714.05 4432238.3;
 -1544186 4016381.2; -1376077.2 3877917.4
 EOF
-pdl_cmp $inv->apply(!$t), pdl(<<'EOF'), 'ortho2 inv', 1e-2;
+is_pdl $inv->apply(!$t), pdl(<<'EOF'), {test_name=>'ortho2 inv', atol=>1e-2};
 -90 -5.9283617; -75.991258 -7.5230948; -90 11.481088; -75.886486 10.220222
 EOF
 
 $fwd = pdl '-146.25 -81.5625; -137.8125 -81.5625; -146.25 -73.125; -137.8125 -73.125';
 $inv = pdl '0 -6210111.4; 4081400 -6210111.4; 0 -4140074.2; 4081400 -4140074.2';
 $t = t_proj_robin( ellps => 'WGS84', over => 1 );
-pdl_cmp $fwd->apply($t), pdl(<<'EOF'), 'robin fwd', 10;
+is_pdl $fwd->apply($t), pdl(<<'EOF'), {test_name=>'robin fwd', atol=>10};
 -8363042.7 -8211603.9; -7880559.4 -8211603.9;
 -9548357.3 -7548659.1; -8997490.5 -7548659.1
 EOF
-pdl_cmp $inv->apply(!$t), pdl(<<'EOF'), 'robin inv', 1e-2;
+is_pdl $inv->apply(!$t), pdl(<<'EOF'), {test_name=>'robin inv', atol=>1e-2};
 0 -58.719767; 53.453033 -58.719767; 0 -38.71881; 46.580505 -38.71881
 EOF