diff --git a/src/spectator/matchers/have_predicate_matcher.cr b/src/spectator/matchers/have_predicate_matcher.cr
index 12902bd..55416b5 100644
--- a/src/spectator/matchers/have_predicate_matcher.cr
+++ b/src/spectator/matchers/have_predicate_matcher.cr
@@ -17,7 +17,7 @@ module Spectator::Matchers
     # Actually performs the test against the expression.
     def match(actual : Expression(T)) : MatchData forall T
       snapshot = snapshot_values(actual.value)
-      if match?(snapshot)
+      if values_match?(snapshot)
         SuccessfulMatchData.new(description)
       else
         FailedMatchData.new(description, "#{actual.label} does not have #{expected.label}", values(snapshot).to_a)
@@ -28,13 +28,18 @@ module Spectator::Matchers
     # A successful match with `#match` should normally fail for this method, and vice-versa.
     def negated_match(actual : Expression(T)) : MatchData forall T
       snapshot = snapshot_values(actual.value)
-      if match?(snapshot)
+      if values_match?(snapshot)
         FailedMatchData.new(description, "#{actual.label} has #{expected.label}", values(snapshot).to_a)
       else
         SuccessfulMatchData.new(description)
       end
     end
 
+    def match?(actual : Expression(T)) : Bool forall T
+      snapshot = snapshot_values(actual.value)
+      values_match?(snapshot)
+    end
+
     # Message displayed when the matcher isn't satisfied.
     #
     # This is only called when `#match?` returns false.
@@ -69,7 +74,7 @@ module Spectator::Matchers
     end
 
     # Checks if all predicate methods from the snapshot of them are satisfied.
-    private def match?(snapshot) : Bool
+    private def values_match?(snapshot) : Bool
       # Test each predicate and immediately return false if one is false.
       {% for attribute in ExpectedType.keys %}
       return false unless snapshot[{{attribute.symbolize}}]
diff --git a/src/spectator/mocks/exception_method_stub.cr b/src/spectator/mocks/exception_method_stub.cr
index ce34b64..55025fa 100644
--- a/src/spectator/mocks/exception_method_stub.cr
+++ b/src/spectator/mocks/exception_method_stub.cr
@@ -7,7 +7,7 @@ module Spectator::Mocks
       super(name, location, args)
     end
 
-    def call(_args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
+    def call(args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
       raise @exception
     end
   end
diff --git a/src/spectator/mocks/multi_value_method_stub.cr b/src/spectator/mocks/multi_value_method_stub.cr
index 944e985..56198d1 100644
--- a/src/spectator/mocks/multi_value_method_stub.cr
+++ b/src/spectator/mocks/multi_value_method_stub.cr
@@ -10,7 +10,7 @@ module Spectator::Mocks
       raise ArgumentError.new("Values must have at least one item") if @values.size < 1
     end
 
-    def call(_args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
+    def call(args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
       value = @values[@index]
       @index += 1 if @index < @values.size - 1
       value
diff --git a/src/spectator/mocks/nil_method_stub.cr b/src/spectator/mocks/nil_method_stub.cr
index 38b1aab..129913c 100644
--- a/src/spectator/mocks/nil_method_stub.cr
+++ b/src/spectator/mocks/nil_method_stub.cr
@@ -4,7 +4,7 @@ require "./value_method_stub"
 
 module Spectator::Mocks
   class NilMethodStub < GenericMethodStub(Nil)
-    def call(_args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
+    def call(args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
       nil
     end
 
diff --git a/src/spectator/mocks/original_method_stub.cr b/src/spectator/mocks/original_method_stub.cr
index 041325a..414dfc0 100644
--- a/src/spectator/mocks/original_method_stub.cr
+++ b/src/spectator/mocks/original_method_stub.cr
@@ -3,7 +3,7 @@ require "./generic_method_stub"
 
 module Spectator::Mocks
   class OriginalMethodStub < GenericMethodStub(Nil)
-    def call(_args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
+    def call(args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
       yield
     end
   end
diff --git a/src/spectator/mocks/proc_method_stub.cr b/src/spectator/mocks/proc_method_stub.cr
index a72eb3c..e08880f 100644
--- a/src/spectator/mocks/proc_method_stub.cr
+++ b/src/spectator/mocks/proc_method_stub.cr
@@ -11,7 +11,7 @@ module Spectator::Mocks
       ProcMethodStub.new(name, location, block, args)
     end
 
-    def call(_args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
+    def call(args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
       @proc.call
     end
   end
diff --git a/src/spectator/mocks/value_method_stub.cr b/src/spectator/mocks/value_method_stub.cr
index cda6b22..a7bf1c5 100644
--- a/src/spectator/mocks/value_method_stub.cr
+++ b/src/spectator/mocks/value_method_stub.cr
@@ -7,7 +7,7 @@ module Spectator::Mocks
       super(name, location, args)
     end
 
-    def call(_args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
+    def call(args : GenericArguments(T, NT), & : -> RT) forall T, NT, RT
       @value
     end
   end
diff --git a/src/spectator/null_node_filter.cr b/src/spectator/null_node_filter.cr
index cee8736..b7d37d8 100644
--- a/src/spectator/null_node_filter.cr
+++ b/src/spectator/null_node_filter.cr
@@ -9,7 +9,7 @@ module Spectator
     end
 
     # Checks whether the node satisfies the filter.
-    def includes?(_node) : Bool
+    def includes?(node) : Bool
       @match
     end
   end