diff --git a/modules/Bio/EnsEMBL/DBSQL/BiotypeAdaptor.pm b/modules/Bio/EnsEMBL/DBSQL/BiotypeAdaptor.pm
index 86d69c5cef1845e84ac4ed0aa19f042c151903f3..66693733fd7fbf46c4b4cb36ef986da83a44158d 100644
--- a/modules/Bio/EnsEMBL/DBSQL/BiotypeAdaptor.pm
+++ b/modules/Bio/EnsEMBL/DBSQL/BiotypeAdaptor.pm
@@ -65,7 +65,7 @@ use parent qw(Bio::EnsEMBL::DBSQL::BaseAdaptor);
   Arg [1]    : none
   Description: PROTECTED implementation of superclass abstract method.
                Returns the names, aliases of the tables to use for queries.
-  Returntype : list of listrefs of strings
+  Returntype : list of arrays of strings
   Exceptions : none
 
 =cut
@@ -99,7 +99,7 @@ sub _columns {
   Example    : none
   Description: PROTECTED implementation of abstract superclass method.
                responsible for the creation of ProteinFeatures
-  Returntype : listref of Bio::EnsEMBL::Biotype objects
+  Returntype : arrayref of Bio::EnsEMBL::Biotype objects
   Exceptions : none
 
 =cut
@@ -174,8 +174,8 @@ sub fetch_by_name_object_type {
                The object_type of the biotypes to retrieve (gene or transcript).
   Example    : $biotypes = $biotype_adaptor->fetch_all_by_object_type('gene');
   Description: Retrieves an array reference of biotype objects from the database.
-  Returntype : arrayref of Bio::EnsEMBL::Biotype objects or empty array
-  Warning    : If empty array is to be returned
+  Returntype : arrayref of Bio::EnsEMBL::Biotype objects or empty arrayref
+  Warning    : If empty arrayref is to be returned
   Exceptions : none
 
 =cut
diff --git a/modules/t/biotype.t b/modules/t/biotype.t
index 4530596551ff9c9eae24b50ccb49bb750f166aa2..2de5367999ea40ddd8e25a3bebc1885f59ddca11 100644
--- a/modules/t/biotype.t
+++ b/modules/t/biotype.t
@@ -52,8 +52,8 @@ is($biotype1->object_type, 'gene', 'Biotype is from Gene object');
 is($biotype1->name, 'protein_coding', 'Biotype name is protein_coding');
 is($biotype1->biotype_group, 'coding', 'Biotype group is coding');
 is($biotype1->so_acc, 'SO:0001217', 'Biotype protein_coding refers to SO:0001217');
-throws_ok { $biotype1->so_acc('test') } qr/so_acc must be a Sequence Ontology accession/,  'so_acc() requires a SO acc like string';
-throws_ok { $biotype1->object_type('test') } qr/object_type must be gene or transcript/,  'object_type() must be gene or transcript';
+throws_ok { $biotype1->so_acc('test') } qr/so_acc must be a Sequence Ontology accession/, 'so_acc() requires a SO acc like string';
+throws_ok { $biotype1->object_type('test') } qr/object_type must be gene or transcript/, 'object_type() must be gene or transcript';
 
 # test transcript biotype object
 my $transcript = $gene->canonical_transcript;