diff --git a/TrsrDB.pm b/TrsrDB.pm
index 1bf3247..e3e5e9c 100644
--- a/TrsrDB.pm
+++ b/TrsrDB.pm
@@ -14,7 +14,7 @@ sub import {
     return if @_ == 1;
     croak "use TrsrDB \$your_db_handle missing" if !defined $dbh_ref;
     $$dbh_ref = $class->connect(
-        "DBI:SQLite:" . ($filename // ":memory:"),
+        "DBI:SQLite:" . ($filename // $ENV{TRSRDB_SQLITE_FILE} // ":memory:"),
         "", "", {
            sqlite_unicode => 1,
            on_connect_call => 'use_foreign_keys',
diff --git a/t/schema.out b/t/schema.out
index 5e0f26d..f2fd0b1 100644
--- a/t/schema.out
+++ b/t/schema.out
@@ -9,9 +9,9 @@ john:	0	+0	0
 Club:	0	+0	-16250
 alex:	7200	+16250	0
 # Some updates and deletes that could, unless denied, destroy consistency ...
-Error: near line 409: paid is set and adjusted automatically according to added Transfer records
-Error: near line 410: Debt is involved in transfers to revoke at first
-Error: near line 411: FOREIGN KEY constraint failed
+Error: near line 41: paid is set and adjusted automatically according to added Transfer records
+Error: near line 42: Debt is involved in transfers to revoke at first
+Error: near line 43: FOREIGN KEY constraint failed
 # After revoking transactions, you are free to change or delete debts and credits ...
 Club:	7200	+0	0
 alex:	0	+0	0
diff --git a/t/schema.sh b/t/schema.sh
index c3f58a0..87397d9 100644
--- a/t/schema.sh
+++ b/t/schema.sh
@@ -1 +1,4 @@
-diff t/schema.out <(cat {,t/}schema.sql | sqlite3 2>&1)
+echo "My database file: $1"
+if sqlite3 $1 < schema.sql; then
+    diff t/schema.out <(sqlite3 $1 < t/schema.sql 2>&1)
+fi
diff --git a/t/schema.t b/t/schema.t
index d0c97a7..a13b33f 100644
--- a/t/schema.t
+++ b/t/schema.t
@@ -1,7 +1,7 @@
 use strict;
 
 my $db;
-use TrsrDB \$db => 'trsr.db';
+use TrsrDB \$db => $ENV{TRSRDB_SQLITE_FILE};
 use Test::More;
 
 $db->resultset("Account")->create({ ID => "Club", altId => 1, type => 'eV' }); 
diff --git a/test.sh b/test.sh
index c021a92..96a9eff 100755
--- a/test.sh
+++ b/test.sh
@@ -1,5 +1,20 @@
 #!/bin/bash
-source t/schema.sh
+
+abort () {
+   echo Database not deleted.
+   exit ${1:-1}
+}
+
+db=$(mktemp -t trsr-XXXXXXXXX.db);
+bash t/schema.sh $db
 if [ $? == 0 ]; then
    echo Tests passed.
+else abort
+fi
+
+> $db; sqlite3 $db < schema.sql
+export TRSRDB_SQLITE_FILE=$db
+if prove -r t; then
+    rm $db
+else abort $?
 fi