diff --git a/shard.yml b/shard.yml
index 71ef960..55ce215 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: spectator
-version: 0.5.3
+version: 0.6.0
 description: |
   A feature-rich spec testing framework for Crystal with similarities to RSpec.
 
diff --git a/spec/matchers/case_matcher_spec.cr b/spec/matchers/case_matcher_spec.cr
index cf4d442..573a30b 100644
--- a/spec/matchers/case_matcher_spec.cr
+++ b/spec/matchers/case_matcher_spec.cr
@@ -88,6 +88,28 @@ describe Spectator::Matchers::CaseMatcher do
               match_data.matched?.should be_false
             end
           end
+
+          context "with a matching regex" do
+            it "is true" do
+              value = "foobar"
+              pattern = /foo/
+              partial = new_partial(value)
+              matcher = Spectator::Matchers::CaseMatcher.new(pattern)
+              match_data = matcher.match(partial)
+              match_data.matched?.should be_true
+            end
+          end
+
+          context "with a non-matching regex" do
+            it "is false" do
+              value = "foo"
+              pattern = /bar/
+              partial = new_partial(value)
+              matcher = Spectator::Matchers::CaseMatcher.new(pattern)
+              match_data = matcher.match(partial)
+              match_data.matched?.should be_false
+            end
+          end
         end
       end
 
@@ -116,14 +138,6 @@ describe Spectator::Matchers::CaseMatcher do
       end
 
       describe "#message" do
-        it "mentions ===" do
-          value = 42
-          partial = new_partial(value)
-          matcher = Spectator::Matchers::CaseMatcher.new(value)
-          match_data = matcher.match(partial)
-          match_data.message.should contain("===")
-        end
-
         it "contains the actual label" do
           value = 42
           label = "everything"
@@ -155,14 +169,6 @@ describe Spectator::Matchers::CaseMatcher do
       end
 
       describe "#negated_message" do
-        it "mentions ===" do
-          value = 42
-          partial = new_partial(value)
-          matcher = Spectator::Matchers::CaseMatcher.new(value)
-          match_data = matcher.match(partial)
-          match_data.negated_message.should contain("===")
-        end
-
         it "contains the actual label" do
           value = 42
           label = "everything"
diff --git a/spec/matchers/reference_matcher_spec.cr b/spec/matchers/reference_matcher_spec.cr
new file mode 100644
index 0000000..b029090
--- /dev/null
+++ b/spec/matchers/reference_matcher_spec.cr
@@ -0,0 +1,152 @@
+require "../spec_helper"
+
+describe Spectator::Matchers::ReferenceMatcher do
+  describe "#match" do
+    context "returned MatchData" do
+      describe "#matched?" do
+        context "with the same instance" do
+          it "is true" do
+            # Box is used because it is a reference type and doesn't override the == method.
+            ref = Box.new([] of Int32)
+            partial = new_partial(ref)
+            matcher = Spectator::Matchers::ReferenceMatcher.new(ref)
+            match_data = matcher.match(partial)
+            match_data.matched?.should be_true
+          end
+        end
+
+        context "with different instances" do
+          context "with same contents" do
+            it "is false" do
+              array1 = [1, 2, 3]
+              array2 = [1, 2, 3]
+              partial = new_partial(array1)
+              matcher = Spectator::Matchers::ReferenceMatcher.new(array2)
+              match_data = matcher.match(partial)
+              match_data.matched?.should be_false
+            end
+          end
+
+          context "with a duplicated instance" do
+            it "is false" do
+              array1 = [1, 2, 3]
+              array2 = array1.dup
+              partial = new_partial(array1)
+              matcher = Spectator::Matchers::ReferenceMatcher.new(array2)
+              match_data = matcher.match(partial)
+              match_data.matched?.should be_false
+            end
+          end
+
+          context "with the same type" do
+            it "is false" do
+              obj1 = "foo"
+              obj2 = "bar"
+              partial = new_partial(obj1)
+              matcher = Spectator::Matchers::ReferenceMatcher.new(obj2)
+              match_data = matcher.match(partial)
+              match_data.matched?.should be_false
+            end
+          end
+
+          context "with a different type" do
+            it "is false" do
+              obj1 = "foobar"
+              obj2 = [1, 2, 3]
+              partial = new_partial(obj1)
+              matcher = Spectator::Matchers::ReferenceMatcher.new(obj2)
+              match_data = matcher.match(partial)
+              match_data.matched?.should be_false
+            end
+          end
+        end
+      end
+
+      describe "#values" do
+        context "expected" do
+          it "is the expected value" do
+            actual = "foobar"
+            expected = /foo/
+            partial = new_partial(actual)
+            matcher = Spectator::Matchers::ReferenceMatcher.new(expected)
+            match_data = matcher.match(partial)
+            match_data_value_sans_prefix(match_data.values, :expected)[:value].should eq(expected)
+          end
+        end
+
+        context "actual" do
+          it "is the actual value" do
+            actual = "foobar"
+            expected = /foo/
+            partial = new_partial(actual)
+            matcher = Spectator::Matchers::ReferenceMatcher.new(expected)
+            match_data = matcher.match(partial)
+            match_data_value_sans_prefix(match_data.values, :actual)[:value].should eq(actual)
+          end
+        end
+      end
+
+      describe "#message" do
+        it "contains the actual label" do
+          value = "foobar"
+          label = "everything"
+          partial = new_partial(value, label)
+          matcher = Spectator::Matchers::ReferenceMatcher.new(value)
+          match_data = matcher.match(partial)
+          match_data.message.should contain(label)
+        end
+
+        it "contains the expected label" do
+          value = "foobar"
+          label = "everything"
+          partial = new_partial(value)
+          matcher = Spectator::Matchers::ReferenceMatcher.new(value, label)
+          match_data = matcher.match(partial)
+          match_data.message.should contain(label)
+        end
+
+        context "when expected label is omitted" do
+          it "contains stringified form of expected value" do
+            obj1 = "foo"
+            obj2 = "bar"
+            partial = new_partial(obj1)
+            matcher = Spectator::Matchers::ReferenceMatcher.new(obj2)
+            match_data = matcher.match(partial)
+            match_data.message.should contain(obj2.to_s)
+          end
+        end
+      end
+
+      describe "#negated_message" do
+        it "contains the actual label" do
+          value = "foobar"
+          label = "everything"
+          partial = new_partial(value, label)
+          matcher = Spectator::Matchers::ReferenceMatcher.new(value)
+          match_data = matcher.match(partial)
+          match_data.negated_message.should contain(label)
+        end
+
+        it "contains the expected label" do
+          value = "foobar"
+          label = "everything"
+          partial = new_partial(value)
+          matcher = Spectator::Matchers::ReferenceMatcher.new(value, label)
+          match_data = matcher.match(partial)
+          match_data.negated_message.should contain(label)
+        end
+
+        context "when expected label is omitted" do
+          it "contains stringified form of expected value" do
+            obj1 = "foo"
+            obj2 = "bar"
+            partial = new_partial(obj1)
+            matcher = Spectator::Matchers::ReferenceMatcher.new(obj2)
+            match_data = matcher.match(partial)
+            match_data.negated_message.should contain(obj2.to_s)
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/matchers/regex_matcher_spec.cr b/spec/matchers/regex_matcher_spec.cr
deleted file mode 100644
index 295b9a7..0000000
--- a/spec/matchers/regex_matcher_spec.cr
+++ /dev/null
@@ -1,147 +0,0 @@
-require "../spec_helper"
-
-describe Spectator::Matchers::RegexMatcher do
-  describe "#match" do
-    it "compares using #=~" do
-      spy = SpySUT.new
-      partial = new_partial(spy)
-      matcher = Spectator::Matchers::RegexMatcher.new(/foobar/)
-      matcher.match(partial)
-      spy.match_call_count.should be > 0
-    end
-
-    context "returned MatchData" do
-      describe "#matched?" do
-        context "with a matching pattern" do
-          it "is true" do
-            value = "foobar"
-            pattern = /foo/
-            partial = new_partial(value)
-            matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-            match_data = matcher.match(partial)
-            match_data.matched?.should be_true
-          end
-        end
-
-        context "with a non-matching pattern" do
-          it "is false" do
-            value = "foo"
-            pattern = /bar/
-            partial = new_partial(value)
-            matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-            match_data = matcher.match(partial)
-            match_data.matched?.should be_false
-          end
-        end
-      end
-
-      describe "#values" do
-        context "expected" do
-          it "is the expected value" do
-            value = "foo"
-            pattern = /bar/
-            partial = new_partial(value)
-            matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-            match_data = matcher.match(partial)
-            match_data_value_sans_prefix(match_data.values, :expected)[:value].should eq(pattern)
-          end
-        end
-
-        context "actual" do
-          it "is the actual value" do
-            value = "foo"
-            pattern = /bar/
-            partial = new_partial(value)
-            matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-            match_data = matcher.match(partial)
-            match_data_value_sans_prefix(match_data.values, :actual)[:value].should eq(value)
-          end
-        end
-      end
-
-      describe "#message" do
-        it "mentions =~" do
-          value = "foobar"
-          pattern = /foo/
-          partial = new_partial(value)
-          matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-          match_data = matcher.match(partial)
-          match_data.message.should contain("=~")
-        end
-
-        it "contains the actual label" do
-          value = "foobar"
-          label = "different"
-          pattern = /foo/
-          partial = new_partial(value, label)
-          matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-          match_data = matcher.match(partial)
-          match_data.message.should contain(label)
-        end
-
-        it "contains the expected label" do
-          value = "foobar"
-          label = "different"
-          pattern = /foo/
-          partial = new_partial(value)
-          matcher = Spectator::Matchers::RegexMatcher.new(pattern, label)
-          match_data = matcher.match(partial)
-          match_data.message.should contain(label)
-        end
-
-        context "when expected label is omitted" do
-          it "contains stringified form of expected value" do
-            value = "foobar"
-            pattern = /foo/
-            partial = new_partial(value)
-            matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-            match_data = matcher.match(partial)
-            match_data.message.should contain(pattern.to_s)
-          end
-        end
-      end
-
-      describe "#negated_message" do
-        it "mentions =~" do
-          value = "foobar"
-          pattern = /foo/
-          partial = new_partial(value)
-          matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-          match_data = matcher.match(partial)
-          match_data.negated_message.should contain("=~")
-        end
-
-        it "contains the actual label" do
-          value = "foobar"
-          label = "different"
-          pattern = /foo/
-          partial = new_partial(value, label)
-          matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-          match_data = matcher.match(partial)
-          match_data.negated_message.should contain(label)
-        end
-
-        it "contains the expected label" do
-          value = "foobar"
-          label = "different"
-          pattern = /foo/
-          partial = new_partial(value)
-          matcher = Spectator::Matchers::RegexMatcher.new(pattern, label)
-          match_data = matcher.match(partial)
-          match_data.negated_message.should contain(label)
-        end
-
-        context "when expected label is omitted" do
-          it "contains stringified form of expected value" do
-            value = "foobar"
-            pattern = /foo/
-            partial = new_partial(value)
-            matcher = Spectator::Matchers::RegexMatcher.new(pattern)
-            match_data = matcher.match(partial)
-            match_data.negated_message.should contain(pattern.to_s)
-          end
-        end
-      end
-    end
-  end
-end
diff --git a/src/spectator/dsl/matcher_dsl.cr b/src/spectator/dsl/matcher_dsl.cr
index 58e38af..def9910 100644
--- a/src/spectator/dsl/matcher_dsl.cr
+++ b/src/spectator/dsl/matcher_dsl.cr
@@ -47,18 +47,18 @@ module Spectator::DSL
       ::Spectator::Matchers::TruthyMatcher.new(true)
     end
 
-    # Indicates that some value should semantically equal another.
-    # The === operator is used for this check.
-    # This has identical behavior as a "when" condition in a case block.
+    # Indicates that some object should be the same as another.
+    # This checks if two references are the same.
+    # The `Reference#same?` method is used for this check.
     #
     # Examples:
     # ```
-    # expect(1 + 2).to be(3)
-    # expect(5).to be(Int32) # Using `#be_a` instead is recommened here.
-    # expect(tuple).to be({1, 2})
+    # obj = "foobar"
+    # expect(obj).to be(obj)
+    # expect(obj.dup).to_not be(obj)
     # ```
     macro be(expected)
-      ::Spectator::Matchers::CaseMatcher.new({{expected}}, {{expected.stringify}})
+      ::Spectator::Matchers::ReferenceMatcher.new({{expected}}, {{expected.stringify}})
     end
 
     # Indicates that some value should be of a specified type.
@@ -155,17 +155,20 @@ module Spectator::DSL
     end
 
     # Indicates that some value should match another.
-    # The =~ operator is used for this check.
-    # Typically a regular expression is used,
-    # but any type that has the =~ operator will work.
+    # The === (case equality) operator is used for this check.
+    # Typically a regular expression is used.
+    # This has identical behavior as a "when" condition in a case block.
     #
     # Examples:
     # ```
     # expect("foo").to match(/foo|bar/)
     # expect("BAR").to match(/foo|bar/i)
+    # expect(1 + 2).to match(3)
+    # expect(5).to match(Int32) # Using `#be_a` instead is recommened here.
+    # expect({:foo, 5}).to match({Symbol, Int32})
     # ```
     macro match(expected)
-      ::Spectator::Matchers::RegexMatcher.new({{expected}}, {{expected.stringify}})
+      ::Spectator::Matchers::CaseMatcher.new({{expected}}, {{expected.stringify}})
     end
 
     # Indicates that some value should be true.
diff --git a/src/spectator/matchers/case_matcher.cr b/src/spectator/matchers/case_matcher.cr
index 8dfc881..d321468 100644
--- a/src/spectator/matchers/case_matcher.cr
+++ b/src/spectator/matchers/case_matcher.cr
@@ -34,13 +34,13 @@ module Spectator::Matchers
       # Describes the condition that satisfies the matcher.
       # This is informational and displayed to the end-user.
       def message
-        "#{@values.actual_label} equals #{@values.expected_label} (using ===)"
+        "#{@values.actual_label} matches #{@values.expected_label}"
       end
 
       # Describes the condition that won't satsify the matcher.
       # This is informational and displayed to the end-user.
       def negated_message
-        "#{@values.actual_label} does not equal #{@values.expected_label} (using ===)"
+        "#{@values.actual_label} does not match #{@values.expected_label}"
       end
     end
   end
diff --git a/src/spectator/matchers/regex_matcher.cr b/src/spectator/matchers/reference_matcher.cr
similarity index 76%
rename from src/spectator/matchers/regex_matcher.cr
rename to src/spectator/matchers/reference_matcher.cr
index bd679a3..1463a2a 100644
--- a/src/spectator/matchers/regex_matcher.cr
+++ b/src/spectator/matchers/reference_matcher.cr
@@ -1,12 +1,12 @@
 require "./value_matcher"
 
 module Spectator::Matchers
-  # Matcher that tests whether a value matches a regular expression.
-  # The value is compared with the =~ operator.
-  struct RegexMatcher(ExpectedType) < ValueMatcher(ExpectedType)
+  # Matcher that tests whether two references are the same.
+  # The values are compared with the `Reference#same?` method.
+  struct ReferenceMatcher(ExpectedType) < ValueMatcher(ExpectedType)
     # Determines whether the matcher is satisfied with the value given to it.
     private def match?(actual)
-      !!(actual =~ expected)
+      actual.same?(expected)
     end
 
     # Determines whether the matcher is satisfied with the partial given to it.
@@ -34,13 +34,13 @@ module Spectator::Matchers
       # Describes the condition that satisfies the matcher.
       # This is informational and displayed to the end-user.
       def message
-        "#{@values.actual_label} matches #{@values.expected_label} (using =~)"
+        "#{@values.actual_label} is #{@values.expected_label}"
       end
 
       # Describes the condition that won't satsify the matcher.
       # This is informational and displayed to the end-user.
       def negated_message
-        "#{@values.actual_label} does not match #{@values.expected_label} (using =~)"
+        "#{@values.actual_label} is not #{@values.expected_label}"
       end
     end
   end