diff --git a/dist.ini b/dist.ini
index 6f2fb12..167e3e2 100644
--- a/dist.ini
+++ b/dist.ini
@@ -23,7 +23,6 @@ directory = examples
 [PodVersion]
 
 [Prereqs / TestRequires]
-File::Temp   = 0
 Test::More   = 0.90
 Math::BigInt = 1.997
 
diff --git a/t/00prim.t b/t/00prim.t
index cd18732..904c9c6 100644
--- a/t/00prim.t
+++ b/t/00prim.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that the primitive operators are working
diff --git a/t/01tag.t b/t/01tag.t
index dd375af..40e28a0 100644
--- a/t/01tag.t
+++ b/t/01tag.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that the primitive operators are working
diff --git a/t/02seq.t b/t/02seq.t
index 531f2fe..bc21712 100644
--- a/t/02seq.t
+++ b/t/02seq.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of sequences
diff --git a/t/03seqof.t b/t/03seqof.t
index a5e699b..66683b6 100644
--- a/t/03seqof.t
+++ b/t/03seqof.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that the primitive operators are working
diff --git a/t/04opt.t b/t/04opt.t
index 33fba19..7f23fca 100644
--- a/t/04opt.t
+++ b/t/04opt.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that the primitive operators are working
diff --git a/t/05time.t b/t/05time.t
index fe6a179..f444e7f 100644
--- a/t/05time.t
+++ b/t/05time.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that the primitive operators are working
diff --git a/t/06bigint.t b/t/06bigint.t
index ab1164f..f9aeba3 100644
--- a/t/06bigint.t
+++ b/t/06bigint.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test bigint INTEGER encoding/decoding
diff --git a/t/07io.t b/t/07io.t
index bb1c804..706cf51 100644
--- a/t/07io.t
+++ b/t/07io.t
@@ -1,8 +1,7 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 use Convert::ASN1 qw(:io);
 use IO::Socket;
-use File::Temp ();
 
 print "1..11\n";
 
@@ -15,11 +14,11 @@ my  $result = pack("C*", 0x30, 0x3D, 0x04, 0x04, 0x46, 0x72, 0x65, 0x64,
 			 0x73, 0x74, 0x04, 0x02, 0x6F, 0x66, 0x04, 0x07,
 			 0x73, 0x74, 0x72, 0x69, 0x6E, 0x67, 0x73);
 
-$fd = File::Temp->new('UNLINK' => 0);
-$file = $fd->filename;
-asn_write($fd, $result);
-asn_write($fd, $result);
-$fd->close;
+($file = $0) =~ s/t$/dat/;
+open(OUT,"> $file");
+asn_write(*OUT, $result);
+asn_write(*OUT, $result);
+close(OUT);
 
 open(IN,"< $file");
 sysread(IN,$buffer,1024);
diff --git a/t/08set.t b/t/08set.t
index 7554157..b35a7ba 100644
--- a/t/08set.t
+++ b/t/08set.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of sets
diff --git a/t/09contr.t b/t/09contr.t
index 72d25fc..2213c7e 100644
--- a/t/09contr.t
+++ b/t/09contr.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the decode on constructed values
diff --git a/t/10choice.t b/t/10choice.t
index 93d194f..6ceeb6d 100644
--- a/t/10choice.t
+++ b/t/10choice.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of choices
diff --git a/t/11explicit.t b/t/11explicit.t
index 195958c..7e24506 100644
--- a/t/11explicit.t
+++ b/t/11explicit.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 BEGIN { require 't/funcs.pl' }
 
diff --git a/t/11indef.t b/t/11indef.t
index b0581d7..7c3886d 100644
--- a/t/11indef.t
+++ b/t/11indef.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that indefinite length encodings can be decoded
diff --git a/t/12der.t b/t/12der.t
index 4469bd1..b7d1b79 100644
--- a/t/12der.t
+++ b/t/12der.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of sets
diff --git a/t/13utf8.t b/t/13utf8.t
index c8bff82..1f62042 100644
--- a/t/13utf8.t
+++ b/t/13utf8.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of utf8 strings
diff --git a/t/14any.t b/t/14any.t
index 799e1dc..4147764 100644
--- a/t/14any.t
+++ b/t/14any.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Check whether the ANY DEFINED BY syntax is working
diff --git a/t/15extseq.t b/t/15extseq.t
index af934e2..6060793 100644
--- a/t/15extseq.t
+++ b/t/15extseq.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of sequences
diff --git a/t/16extset.t b/t/16extset.t
index f3fbea7..c57ac0c 100644
--- a/t/16extset.t
+++ b/t/16extset.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of sequences
diff --git a/t/17extchoice.t b/t/17extchoice.t
index a3ba5d9..66bd9c5 100644
--- a/t/17extchoice.t
+++ b/t/17extchoice.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test the use of sequences
diff --git a/t/18tagdefault.t b/t/18tagdefault.t
index 18fb1d8..6a1fa3b 100644
--- a/t/18tagdefault.t
+++ b/t/18tagdefault.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Test that default EXPLICIT tagging works.
diff --git a/t/99misc.t b/t/99misc.t
index da3044a..4b67aba 100644
--- a/t/99misc.t
+++ b/t/99misc.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 #
 # Misc tests from github reported issues
diff --git a/t/x509.t b/t/x509.t
index f931385..3fd5ba0 100644
--- a/t/x509.t
+++ b/t/x509.t
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 print "1..26\n";