diff --git a/lib/sorted_containers/sorted_array.rb b/lib/sorted_containers/sorted_array.rb
index 34442f5..1891870 100644
--- a/lib/sorted_containers/sorted_array.rb
+++ b/lib/sorted_containers/sorted_array.rb
@@ -620,25 +620,6 @@ def fill(*args, &block)
     # rubocop:enable Metrics/CyclomaticComplexity
     # rubocop:enable Metrics/MethodLength
 
-    # Calls the block, if given, with each element of +self+;
-    # returns a new SortedArray containing those elements of +self+
-    # for which the block returns a truthy value.
-    #
-    # If no block is given, an Enumerator is returned instead.
-    #
-    # @yield [value] The block to filter with.
-    # @return [SortedArray, Enumerator] The filtered array.
-    def select
-      return to_enum(:select) unless block_given?
-
-      new_values = []
-      each do |value|
-        new_values << value if yield(value)
-      end
-      self.class.new(new_values, load_factor: @load_factor)
-    end
-    alias filter select
-
     # Calls the block, if given, with each element of +self+;
     # returns +self+ with the elements for which the block returns a truthy value.
     #
@@ -1034,18 +1015,6 @@ def rassoc(obj)
       index.nil? ? nil : self[index]
     end
 
-    # Returns a new SortedArray whose elements are all those from +self+ for which the block returns false or nil.
-    #
-    # Returns an Enumerator if no block is given.
-    #
-    # @yield [value] The block to reject with.
-    # @return [SortedArray, Enumerator] The rejected array.
-    def reject
-      return to_enum(:reject) unless block_given?
-
-      select { |value| !yield(value) }
-    end
-
     # Deletes every element of +self+ for which block evaluates to true.
     #
     # Returns +self+ if any changes were made, otherwise returns +nil+.
diff --git a/spec/sorted_array_spec.rb b/spec/sorted_array_spec.rb
index 42f3277..f3b0e99 100644
--- a/spec/sorted_array_spec.rb
+++ b/spec/sorted_array_spec.rb
@@ -1030,7 +1030,7 @@ def dig(key)
   describe "select" do
     it "should return the values that meet the given criterion" do
       array = SortedContainers::SortedArray.new([1, 2, 3, 4, 5])
-      expect(array.select { |i| i > 3 }).to eq(SortedContainers::SortedArray.new([4, 5]))
+      expect(array.select { |i| i > 3 }).to eq([4, 5])
     end
 
     it "should return an enumerator if no block is given" do
@@ -1040,7 +1040,7 @@ def dig(key)
 
     it "filter should be an alias for select" do
       array = SortedContainers::SortedArray.new([1, 2, 3, 4, 5])
-      expect(array.filter { |i| i > 3 }).to eq(SortedContainers::SortedArray.new([4, 5]))
+      expect(array.filter { |i| i > 3 }).to eq([4, 5])
     end
   end
 
@@ -1697,7 +1697,7 @@ def dig(key)
   describe "reject" do
     it "should reject elements that meet the given criterion" do
       array = SortedContainers::SortedArray.new([1, 2, 3, 4, 5])
-      expect(array.reject { |i| i > 3 }).to eq(SortedContainers::SortedArray.new([1, 2, 3]))
+      expect(array.reject { |i| i > 3 }).to eq([1, 2, 3])
     end
 
     it "should not modify the original array" do