diff --git a/spec/ruby/core/integer/element_reference_spec.rb b/spec/ruby/core/integer/element_reference_spec.rb
index 4c236a11e79b..7197ecdc0323 100644
--- a/spec/ruby/core/integer/element_reference_spec.rb
+++ b/spec/ruby/core/integer/element_reference_spec.rb
@@ -131,16 +131,10 @@
           0b000001[-3, 4].should == 0b1000
         end
 
-        it "ignores negative upper boundary" do
-          0b101001101[1..-1].should == 0b10100110
-          0b101001101[1..-2].should == 0b10100110
-          0b101001101[1..-3].should == 0b10100110
-        end
-
         it "ignores upper boundary smaller than lower boundary" do
           0b101001101[4..1].should == 0b10100
           0b101001101[4..2].should == 0b10100
-          0b101001101[4..3].should == 0b10100
+          0b101001101[-4..-5].should == 0b1010011010000
         end
 
         it "raises FloatDomainError if any boundary is infinity" do
diff --git a/spec/tags/core/integer/element_reference_tags.txt b/spec/tags/core/integer/element_reference_tags.txt
deleted file mode 100644
index 8f3bb6b33cad..000000000000
--- a/spec/tags/core/integer/element_reference_tags.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-fails:Integer#[] fixnum when index and length passed returns specified number of bits from specified position
-fails:Integer#[] fixnum when index and length passed ensures n[i, len] equals to (n >> i) & ((1 << len) - 1)
-fails:Integer#[] fixnum when index and length passed moves start position to the most significant bits when negative index passed
-fails:Integer#[] fixnum when index and length passed ignores negative length
-fails:Integer#[] fixnum when range passed returns bits specified by range
-fails:Integer#[] fixnum when range passed ensures n[i..j] equals to (n >> i) & ((1 << (j - i + 1)) - 1)
-fails:Integer#[] fixnum when range passed ensures n[i..] equals to (n >> i)
-fails:Integer#[] fixnum when range passed moves lower boundary to the most significant bits when negative value passed
-fails:Integer#[] fixnum when range passed ignores negative upper boundary
-fails:Integer#[] fixnum when range passed ignores upper boundary smaller than lower boundary
-fails:Integer#[] fixnum when range passed raises FloatDomainError if any boundary is infinity
-fails:Integer#[] fixnum when range passed when passed (..i) returns 0 if all i bits equal 0
-fails:Integer#[] fixnum when range passed when passed (..i) raises ArgumentError if any of i bit equals 1
diff --git a/src/main/ruby/truffleruby/core/integer.rb b/src/main/ruby/truffleruby/core/integer.rb
index 84e99cf478c1..caa7a40c05e3 100644
--- a/src/main/ruby/truffleruby/core/integer.rb
+++ b/src/main/ruby/truffleruby/core/integer.rb
@@ -59,9 +59,49 @@ def **(o)
     redo_coerced :**, o
   end
 
-  def [](index)
+  def [](index, len = undefined)
+    if index.kind_of?(Range)
+      handle_range(index)
+    else
+      handle_aref(index, len)
+    end
+  end
+
+  private def handle_aref(index, len)
     index = Primitive.rb_to_int(index)
-    index < 0 ? 0 : (self >> index) & 1
+    if Primitive.undefined?(len)
+      index < 0 ? 0 : (self >> index) & 1
+    else
+      num = self >> index
+      mask = (1 << len) - 1
+
+      num & mask
+    end
+  end
+
+  private def handle_range(range)
+    raise FloatDomainError , 'Infinity' if range.begin == Float::INFINITY || range.end == Float::INFINITY
+    raise FloatDomainError , '-Infinity' if range.begin == -Float::INFINITY || range.end == -Float::INFINITY
+
+    if !Primitive.nil?(range.begin) && !Primitive.nil?(range.end)
+      len = range.end - range.begin
+      len += 1 if !range.exclude_end?
+      num = self >> range.begin
+      mask = (1 << len) - 1
+
+      range.end < range.begin ? num : num & mask
+    elsif Primitive.nil? range.end
+
+      return self >> range.begin
+    else
+      len = range.end
+      len += 1 if !range.exclude_end?
+      mask = (1 << len) - 1
+
+      raise ArgumentError, 'The beginless range for Integer#[] results in infinity' if self & mask != 0 && range.end >= 0
+
+      0
+    end
   end
 
   def allbits?(mask)
diff --git a/test/mri/excludes/TestInteger.rb b/test/mri/excludes/TestInteger.rb
index cb20385870c9..71d3b1d31df1 100644
--- a/test/mri/excludes/TestInteger.rb
+++ b/test/mri/excludes/TestInteger.rb
@@ -11,5 +11,4 @@
 exclude :test_floor, "needs investigation"
 exclude :test_pow, "needs investigation"
 exclude :test_truncate, "needs investigation"
-exclude :test_Integer_with_invalid_exception, "needs investigation"
-exclude :test_aref, "needs investigation"
+exclude :test_Integer_with_invalid_exception, "needs investigation"
\ No newline at end of file