diff --git a/lib/Image/Scale.pm b/lib/Image/Scale.pm
index d2bc9b4..e7372a9 100644
--- a/lib/Image/Scale.pm
+++ b/lib/Image/Scale.pm
@@ -1,6 +1,6 @@
 package Image::Scale;
 
-use strict;
+use strict; use warnings;
 
 use constant IMAGE_SCALE_TYPE_GD       => 0;
 use constant IMAGE_SCALE_TYPE_GD_FIXED => 1;
diff --git a/t/01use.t b/t/01use.t
index 6a87cd9..1f496e5 100644
--- a/t/01use.t
+++ b/t/01use.t
@@ -1,3 +1,3 @@
 use Test::More tests => 1;
-
+use strict; use warnings;
 use_ok('Image::Scale');
\ No newline at end of file
diff --git a/t/02pod.t b/t/02pod.t
index d73d7fa..d0dbb44 100644
--- a/t/02pod.t
+++ b/t/02pod.t
@@ -1,5 +1,5 @@
 use Test::More;
-
+use strict; use warnings;
 eval "use Test::Pod 1.14";
 plan skip_all => 'Test::Pod 1.14 required' if $@;
 plan skip_all => 'set TEST_POD to enable this test' unless $ENV{TEST_POD};
diff --git a/t/03podcoverage.t b/t/03podcoverage.t
index cd08262..490a4aa 100644
--- a/t/03podcoverage.t
+++ b/t/03podcoverage.t
@@ -1,5 +1,5 @@
 use Test::More;
-
+use strict; use warnings;
 eval "use Test::Pod::Coverage 1.04";
 plan skip_all => 'Test::Pod::Coverage 1.04 required' if $@;
 plan skip_all => 'set TEST_POD to enable this test' unless $ENV{TEST_POD};