diff --git a/spec/allow2ban_spec.rb b/spec/allow2ban_spec.rb
index 0b7e7805..105e0ad0 100644
--- a/spec/allow2ban_spec.rb
+++ b/spec/allow2ban_spec.rb
@@ -20,7 +20,8 @@
     describe 'making ok request' do
       it 'succeeds' do
         get '/', {}, 'REMOTE_ADDR' => '1.2.3.4'
-        last_response.status.must_equal 200
+
+        _(last_response.status).must_equal 200
       end
     end
 
@@ -29,17 +30,18 @@
         before { get '/?foo=OMGHAX', {}, 'REMOTE_ADDR' => '1.2.3.4' }
 
         it 'succeeds' do
-          last_response.status.must_equal 200
+          _(last_response.status).must_equal 200
         end
 
         it 'increases fail count' do
           key = "rack::attack:#{Time.now.to_i / @findtime}:allow2ban:count:1.2.3.4"
-          @cache.store.read(key).must_equal 1
+
+          _(@cache.store.read(key)).must_equal 1
         end
 
         it 'is not banned' do
           key = "rack::attack:allow2ban:1.2.3.4"
-          @cache.store.read(key).must_be_nil
+          _(@cache.store.read(key)).must_be_nil
         end
       end
 
@@ -51,17 +53,17 @@
         end
 
         it 'succeeds' do
-          last_response.status.must_equal 200
+          _(last_response.status).must_equal 200
         end
 
         it 'increases fail count' do
           key = "rack::attack:#{Time.now.to_i / @findtime}:allow2ban:count:1.2.3.4"
-          @cache.store.read(key).must_equal 2
+          _(@cache.store.read(key)).must_equal 2
         end
 
         it 'is banned' do
           key = "rack::attack:allow2ban:ban:1.2.3.4"
-          @cache.store.read(key).must_equal 1
+          _(@cache.store.read(key)).must_equal 1
         end
       end
     end
@@ -77,7 +79,8 @@
     describe 'making request for other discriminator' do
       it 'succeeds' do
         get '/', {}, 'REMOTE_ADDR' => '2.2.3.4'
-        last_response.status.must_equal 200
+
+        _(last_response.status).must_equal 200
       end
     end
 
@@ -87,17 +90,17 @@
       end
 
       it 'fails' do
-        last_response.status.must_equal 403
+        _(last_response.status).must_equal 403
       end
 
       it 'does not increase fail count' do
         key = "rack::attack:#{Time.now.to_i / @findtime}:allow2ban:count:1.2.3.4"
-        @cache.store.read(key).must_equal 2
+        _(@cache.store.read(key)).must_equal 2
       end
 
       it 'is still banned' do
         key = "rack::attack:allow2ban:ban:1.2.3.4"
-        @cache.store.read(key).must_equal 1
+        _(@cache.store.read(key)).must_equal 1
       end
     end
 
@@ -107,17 +110,17 @@
       end
 
       it 'fails' do
-        last_response.status.must_equal 403
+        _(last_response.status).must_equal 403
       end
 
       it 'does not increase fail count' do
         key = "rack::attack:#{Time.now.to_i / @findtime}:allow2ban:count:1.2.3.4"
-        @cache.store.read(key).must_equal 2
+        _(@cache.store.read(key)).must_equal 2
       end
 
       it 'is still banned' do
         key = "rack::attack:allow2ban:ban:1.2.3.4"
-        @cache.store.read(key).must_equal 1
+        _(@cache.store.read(key)).must_equal 1
       end
     end
   end
diff --git a/spec/fail2ban_spec.rb b/spec/fail2ban_spec.rb
index 56c9ccc5..6a9d9bcf 100644
--- a/spec/fail2ban_spec.rb
+++ b/spec/fail2ban_spec.rb
@@ -20,7 +20,7 @@
     describe 'making ok request' do
       it 'succeeds' do
         get '/', {}, 'REMOTE_ADDR' => '1.2.3.4'
-        last_response.status.must_equal 200
+        _(last_response.status).must_equal 200
       end
     end
 
@@ -29,17 +29,17 @@
         before { get '/?foo=OMGHAX', {}, 'REMOTE_ADDR' => '1.2.3.4' }
 
         it 'fails' do
-          last_response.status.must_equal 403
+          _(last_response.status).must_equal 403
         end
 
         it 'increases fail count' do
           key = "rack::attack:#{Time.now.to_i / @findtime}:fail2ban:count:1.2.3.4"
-          @cache.store.read(key).must_equal 1
+          _(@cache.store.read(key)).must_equal 1
         end
 
         it 'is not banned' do
           key = "rack::attack:fail2ban:1.2.3.4"
-          @cache.store.read(key).must_be_nil
+          _(@cache.store.read(key)).must_be_nil
         end
       end
 
@@ -51,17 +51,17 @@
         end
 
         it 'fails' do
-          last_response.status.must_equal 403
+          _(last_response.status).must_equal 403
         end
 
         it 'increases fail count' do
           key = "rack::attack:#{Time.now.to_i / @findtime}:fail2ban:count:1.2.3.4"
-          @cache.store.read(key).must_equal 2
+          _(@cache.store.read(key)).must_equal 2
         end
 
         it 'is banned' do
           key = "rack::attack:fail2ban:ban:1.2.3.4"
-          @cache.store.read(key).must_equal 1
+          _(@cache.store.read(key)).must_equal 1
         end
       end
 
@@ -73,7 +73,7 @@
         end
 
         it 'succeeds' do
-          last_response.status.must_equal 200
+          _(last_response.status).must_equal 200
         end
 
         it 'resets fail count' do
@@ -82,7 +82,7 @@
         end
 
         it 'IP is not banned' do
-          Rack::Attack::Fail2Ban.banned?('1.2.3.4').must_equal false
+          _(Rack::Attack::Fail2Ban.banned?('1.2.3.4')).must_equal false
         end
       end
     end
@@ -98,7 +98,8 @@
     describe 'making request for other discriminator' do
       it 'succeeds' do
         get '/', {}, 'REMOTE_ADDR' => '2.2.3.4'
-        last_response.status.must_equal 200
+
+        _(last_response.status).must_equal 200
       end
     end
 
@@ -108,17 +109,17 @@
       end
 
       it 'fails' do
-        last_response.status.must_equal 403
+        _(last_response.status).must_equal 403
       end
 
       it 'does not increase fail count' do
         key = "rack::attack:#{Time.now.to_i / @findtime}:fail2ban:count:1.2.3.4"
-        @cache.store.read(key).must_equal 2
+        _(@cache.store.read(key)).must_equal 2
       end
 
       it 'is still banned' do
         key = "rack::attack:fail2ban:ban:1.2.3.4"
-        @cache.store.read(key).must_equal 1
+        _(@cache.store.read(key)).must_equal 1
       end
     end
 
@@ -128,17 +129,17 @@
       end
 
       it 'fails' do
-        last_response.status.must_equal 403
+        _(last_response.status).must_equal 403
       end
 
       it 'does not increase fail count' do
         key = "rack::attack:#{Time.now.to_i / @findtime}:fail2ban:count:1.2.3.4"
-        @cache.store.read(key).must_equal 2
+        _(@cache.store.read(key)).must_equal 2
       end
 
       it 'is still banned' do
         key = "rack::attack:fail2ban:ban:1.2.3.4"
-        @cache.store.read(key).must_equal 1
+        _(@cache.store.read(key)).must_equal 1
       end
     end
   end
diff --git a/spec/rack_attack_instrumentation_spec.rb b/spec/rack_attack_instrumentation_spec.rb
index 50453205..a8b4527f 100644
--- a/spec/rack_attack_instrumentation_spec.rb
+++ b/spec/rack_attack_instrumentation_spec.rb
@@ -34,7 +34,7 @@ def throttle(_event)
       end
 
       it 'should instrument without error' do
-        last_response.status.must_equal 429
+        _(last_response.status).must_equal 429
         assert_equal 1, CustomSubscriber.notification_count
       end
     end
diff --git a/spec/rack_attack_path_normalizer_spec.rb b/spec/rack_attack_path_normalizer_spec.rb
index 961491d3..52fae263 100644
--- a/spec/rack_attack_path_normalizer_spec.rb
+++ b/spec/rack_attack_path_normalizer_spec.rb
@@ -6,14 +6,14 @@
   subject { Rack::Attack::PathNormalizer }
 
   it 'should have a normalize_path method' do
-    subject.normalize_path('/foo').must_equal '/foo'
+    _(subject.normalize_path('/foo')).must_equal '/foo'
   end
 
   describe 'FallbackNormalizer' do
     subject { Rack::Attack::FallbackPathNormalizer }
 
     it '#normalize_path does not change the path' do
-      subject.normalize_path('').must_equal ''
+      _(subject.normalize_path('')).must_equal ''
     end
   end
 end
diff --git a/spec/rack_attack_spec.rb b/spec/rack_attack_spec.rb
index 39a09289..51d7cf44 100644
--- a/spec/rack_attack_spec.rb
+++ b/spec/rack_attack_spec.rb
@@ -12,7 +12,7 @@
 
     it 'blocks requests with trailing slash' do
       get '/foo/'
-      last_response.status.must_equal 403
+      _(last_response.status).must_equal 403
     end
   end
 
@@ -23,20 +23,20 @@
     end
 
     it 'has a blocklist' do
-      Rack::Attack.blocklists.key?("ip #{@bad_ip}").must_equal true
+      _(Rack::Attack.blocklists.key?("ip #{@bad_ip}")).must_equal true
     end
 
     describe "a bad request" do
       before { get '/', {}, 'REMOTE_ADDR' => @bad_ip }
 
       it "should return a blocklist response" do
-        last_response.status.must_equal 403
-        last_response.body.must_equal "Forbidden\n"
+        _(last_response.status).must_equal 403
+        _(last_response.body).must_equal "Forbidden\n"
       end
 
       it "should tag the env" do
-        last_request.env['rack.attack.matched'].must_equal "ip #{@bad_ip}"
-        last_request.env['rack.attack.match_type'].must_equal :blocklist
+        _(last_request.env['rack.attack.matched']).must_equal "ip #{@bad_ip}"
+        _(last_request.env['rack.attack.match_type']).must_equal :blocklist
       end
 
       it_allows_ok_requests
@@ -54,25 +54,25 @@
         before { get '/', {}, 'REMOTE_ADDR' => @bad_ip, 'HTTP_USER_AGENT' => @good_ua }
 
         it "should allow safelists before blocklists" do
-          last_response.status.must_equal 200
+          _(last_response.status).must_equal 200
         end
 
         it "should tag the env" do
-          last_request.env['rack.attack.matched'].must_equal 'good ua'
-          last_request.env['rack.attack.match_type'].must_equal :safelist
+          _(last_request.env['rack.attack.matched']).must_equal 'good ua'
+          _(last_request.env['rack.attack.match_type']).must_equal :safelist
         end
       end
     end
 
     describe '#blocklisted_response' do
       it 'should exist' do
-        Rack::Attack.blocklisted_response.must_respond_to :call
+        _(Rack::Attack.blocklisted_response).must_respond_to :call
       end
     end
 
     describe '#throttled_response' do
       it 'should exist' do
-        Rack::Attack.throttled_response.must_respond_to :call
+        _(Rack::Attack.throttled_response).must_respond_to :call
       end
     end
   end
diff --git a/spec/rack_attack_throttle_spec.rb b/spec/rack_attack_throttle_spec.rb
index d760d942..8346611b 100644
--- a/spec/rack_attack_throttle_spec.rb
+++ b/spec/rack_attack_throttle_spec.rb
@@ -18,7 +18,7 @@
 
     it 'should set the counter for one request' do
       key = "rack::attack:#{Time.now.to_i / @period}:ip/sec:1.2.3.4"
-      Rack::Attack.cache.store.read(key).must_equal 1
+      _(Rack::Attack.cache.store.read(key)).must_equal 1
     end
 
     it 'should populate throttle data' do
@@ -30,7 +30,7 @@
         discriminator: "1.2.3.4"
       }
 
-      last_request.env['rack.attack.throttle_data']['ip/sec'].must_equal data
+      _(last_request.env['rack.attack.throttle_data']['ip/sec']).must_equal data
     end
   end
 
@@ -40,14 +40,14 @@
     end
 
     it 'should block the last request' do
-      last_response.status.must_equal 429
+      _(last_response.status).must_equal 429
     end
 
     it 'should tag the env' do
-      last_request.env['rack.attack.matched'].must_equal 'ip/sec'
-      last_request.env['rack.attack.match_type'].must_equal :throttle
+      _(last_request.env['rack.attack.matched']).must_equal 'ip/sec'
+      _(last_request.env['rack.attack.match_type']).must_equal :throttle
 
-      last_request.env['rack.attack.match_data'].must_equal(
+      _(last_request.env['rack.attack.match_data']).must_equal(
         count: 2,
         limit: 1,
         period: @period,
@@ -55,11 +55,11 @@
         discriminator: "1.2.3.4"
       )
 
-      last_request.env['rack.attack.match_discriminator'].must_equal('1.2.3.4')
+      _(last_request.env['rack.attack.match_discriminator']).must_equal('1.2.3.4')
     end
 
     it 'should set a Retry-After header' do
-      last_response.headers['Retry-After'].must_equal @period.to_s
+      _(last_response.headers['Retry-After']).must_equal @period.to_s
     end
   end
 end
@@ -78,7 +78,7 @@
 
     it 'should set the counter for one request' do
       key = "rack::attack:#{Time.now.to_i / @period}:ip/sec:1.2.3.4"
-      Rack::Attack.cache.store.read(key).must_equal 1
+      _(Rack::Attack.cache.store.read(key)).must_equal 1
     end
 
     it 'should populate throttle data' do
@@ -90,7 +90,7 @@
         discriminator: "1.2.3.4"
       }
 
-      last_request.env['rack.attack.throttle_data']['ip/sec'].must_equal data
+      _(last_request.env['rack.attack.throttle_data']['ip/sec']).must_equal data
     end
   end
 end
@@ -109,7 +109,7 @@
 
     it 'should set the counter for one request' do
       key = "rack::attack:#{Time.now.to_i / @period}:ip/sec:1.2.3.4"
-      Rack::Attack.cache.store.read(key).must_equal 1
+      _(Rack::Attack.cache.store.read(key)).must_equal 1
     end
 
     it 'should populate throttle data' do
@@ -121,7 +121,7 @@
         discriminator: "1.2.3.4"
       }
 
-      last_request.env['rack.attack.throttle_data']['ip/sec'].must_equal data
+      _(last_request.env['rack.attack.throttle_data']['ip/sec']).must_equal data
     end
   end
 end
diff --git a/spec/rack_attack_track_spec.rb b/spec/rack_attack_track_spec.rb
index bba70355..0db66e47 100644
--- a/spec/rack_attack_track_spec.rb
+++ b/spec/rack_attack_track_spec.rb
@@ -25,8 +25,9 @@ def self.check
 
   it "should tag the env" do
     get '/'
-    last_request.env['rack.attack.matched'].must_equal 'everything'
-    last_request.env['rack.attack.match_type'].must_equal :track
+
+    _(last_request.env['rack.attack.matched']).must_equal 'everything'
+    _(last_request.env['rack.attack.match_type']).must_equal :track
   end
 
   describe "with a notification subscriber and two tracks" do
@@ -43,21 +44,23 @@ def self.check
     end
 
     it "should notify twice" do
-      Counter.check.must_equal 2
+      _(Counter.check).must_equal 2
     end
   end
 
   describe "without limit and period options" do
     it "should assign the track filter to a Check instance" do
       track = Rack::Attack.track("homepage") { |req| req.path == "/" }
-      track.filter.class.must_equal Rack::Attack::Check
+
+      _(track.filter.class).must_equal Rack::Attack::Check
     end
   end
 
   describe "with limit and period options" do
     it "should assign the track filter to a Throttle instance" do
       track = Rack::Attack.track("homepage", limit: 10, period: 10) { |req| req.path == "/" }
-      track.filter.class.must_equal Rack::Attack::Throttle
+
+      _(track.filter.class).must_equal Rack::Attack::Throttle
     end
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 553cb882..49d88731 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -56,8 +56,9 @@ def app
   def self.it_allows_ok_requests
     it "must allow ok requests" do
       get '/', {}, 'REMOTE_ADDR' => '127.0.0.1'
-      last_response.status.must_equal 200
-      last_response.body.must_equal 'Hello World'
+
+      _(last_response.status).must_equal 200
+      _(last_response.body).must_equal 'Hello World'
     end
   end
 end