diff --git a/lib/anystyle/feature/position.rb b/lib/anystyle/feature/position.rb
index 1c2a41b..bd0e00a 100644
--- a/lib/anystyle/feature/position.rb
+++ b/lib/anystyle/feature/position.rb
@@ -4,7 +4,7 @@ class Position < Feature
       attr_reader :idx, :seq
 
       def initialize(idx: :idx, seq: :seq, **opts)
-        super(opts)
+        super(**opts)
         @idx, @seq = idx, seq
       end
 
diff --git a/lib/anystyle/parser.rb b/lib/anystyle/parser.rb
index 25cba79..0f25337 100644
--- a/lib/anystyle/parser.rb
+++ b/lib/anystyle/parser.rb
@@ -87,12 +87,12 @@ def prepare(input, **opts)
         expand Wapiti::Dataset.new([input])
       when String
         if !input.tainted? && input.length < 1024 && File.exists?(input)
-          expand Wapiti::Dataset.open(input, opts)
+          expand Wapiti::Dataset.open(input, **opts)
         else
-          expand Wapiti::Dataset.parse(input, opts)
+          expand Wapiti::Dataset.parse(input, **opts)
         end
       else
-        expand Wapiti::Dataset.parse(input, opts)
+        expand Wapiti::Dataset.parse(input, **opts)
       end
     end
   end
@@ -207,7 +207,7 @@ def prepare(input, **opts)
       opts[:separator] ||= options[:separator]
       opts[:delimiter] ||= options[:delimiter]
       input = input.join("\n") if input.is_a?(Array) && input[0].is_a?(String)
-      super(input, opts)
+      super(input, **opts)
     end
   end
 end
diff --git a/spec/anystyle/dictionary/gdbm_spec.rb b/spec/anystyle/dictionary/gdbm_spec.rb
index 25af71f..35b4f0e 100644
--- a/spec/anystyle/dictionary/gdbm_spec.rb
+++ b/spec/anystyle/dictionary/gdbm_spec.rb
@@ -2,6 +2,7 @@
 
 begin
   require 'gdbm'
+  require 'tmpdir'
 
   module AnyStyle
     describe "GDBM Dictionary Adapter" do
diff --git a/spec/anystyle/normalizer/arxiv_spec.rb b/spec/anystyle/normalizer/arxiv_spec.rb
index 106e602..d0664e2 100644
--- a/spec/anystyle/normalizer/arxiv_spec.rb
+++ b/spec/anystyle/normalizer/arxiv_spec.rb
@@ -7,7 +7,7 @@ module AnyStyle
         'Preprint, arXiv:1402.7034,' => { arxiv: ['1402.7034'] },
         '[arXiv:hepph/9905221].' => { arxiv: ['hepph/9905221'] }
       }).each do |(a, b)|
-        expect(n.normalize(note: [a])).to include(b)
+        expect(n.normalize({ note: [a] })).to include(b)
       end
     end
   end
diff --git a/spec/anystyle/normalizer/locator_spec.rb b/spec/anystyle/normalizer/locator_spec.rb
index 40f9233..a38c8c9 100644
--- a/spec/anystyle/normalizer/locator_spec.rb
+++ b/spec/anystyle/normalizer/locator_spec.rb
@@ -10,7 +10,7 @@ module AnyStyle
         'doi:10.1002/mpr.33.' => { doi: ['10.1002/mpr.33.'] },
         'https://doi.org/10.1000/182' => { doi: ['10.1000/182'] }
       }).each do |(a, b)|
-        expect(n.normalize(doi: [a])).to include(b)
+        expect(n.normalize({ doi: [a] })).to include(b)
       end
     end
 
@@ -19,7 +19,7 @@ module AnyStyle
         'https://doi.org/10/aabbe' => { doi: ['10/aabbe'] },
         'https://doi.org/10.1000/182' => { doi: ['10.1000/182'] }
       }).each do |(a, b)|
-        expect(n.normalize(url: [a])).to include(b)
+        expect(n.normalize({ url: [a] })).to include(b)
       end
     end
   end
diff --git a/spec/anystyle/normalizer/volume_spec.rb b/spec/anystyle/normalizer/volume_spec.rb
index 056235b..4f0681f 100644
--- a/spec/anystyle/normalizer/volume_spec.rb
+++ b/spec/anystyle/normalizer/volume_spec.rb
@@ -48,20 +48,22 @@ module AnyStyle
         '22. Jg. Heft 3,' => { volume: ['22'], issue: ['3'] },
         '19.Jg. H.3,' => { volume: ['19'], issue: ['3'] },
         'Jg. 37:' => { volume: ['37'] }
-        
+
         # 47ème année, n°1,
         # Isuue 140,
         # 40 (4), art. no. 5446343,
         # 129, 4, Pt. 2:
 
       }).each do |(a, b)|
-        expect(n.normalize(volume: [a])).to include(b),
-                                            -> { "'#{a}' should normalise to #{b}, got: " + n.normalize(volume: [a]).to_s }
+        expect(n.normalize({ volume: [a] }))
+          .to include(b), -> {
+            "'#{a}' should normalise to #{b}, got: " + n.normalize(volume: [a]).to_s
+          }
       end
     end
 
     it "extracts number of volumes" do
-      expect(n.normalize(volume: ['8 vols.'])).to include(volume: ['8'])
+      expect(n.normalize({ volume: ['8 vols.'] })).to include(volume: ['8'])
     end
 
     it "extracts page numbers" do
@@ -71,8 +73,10 @@ module AnyStyle
         # '22(3):pp.87-106' => { volume: ['22'], issue: ['3'], pages: ['87-106'] },
         # '35:S42-S45' => { volume: ['35'], pages: ['42-45'] }
       }).each do |(a, b)|
-        expect(n.normalize(volume: [a])).to include(b),
-                                            ->{ "'#{a}' should normalise to #{b}, got: " + n.normalize(volume: [a]).to_s }
+        expect(n.normalize({ volume: [a] }))
+          .to include(b), -> {
+          "'#{a}' should normalise to #{b}, got: " + n.normalize(volume: [a]).to_s
+          }
       end
     end
 
@@ -87,8 +91,10 @@ module AnyStyle
           '19 Jg., Heft 2/2011,' => { volume: ['19'], issue: ['2'], date: ['2011'] },
           'Jg. 51, Heft 3/2000,' => { volume: ['51'], issue: ['3'], date: ['2000'] }
         }).each do |(a, b)|
-          expect(n.normalize(volume: [a])).to include(b),
-                                              ->{ "'#{a}' should normalise to #{b}, got: " + n.normalize(volume: [a]).to_s }
+          expect(n.normalize({ volume: [a] }))
+            .to include(b), -> {
+              "'#{a}' should normalise to #{b}, got: " + n.normalize(volume: [a]).to_s
+            }
         end
       end
     end