diff --git a/Gemfile b/Gemfile
index 130ba98..ca31976 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,11 +4,10 @@ source "https://rubygems.org"
 gemspec
 
 gem "rake"
-gem "minitest"
+gem "tldr", github: "tenderlove/tldr"
 gem "standard"
 gem "standard-sorbet"
 gem "simplecov"
-gem "m"
 
 gem "sorbet-static"
 gem "tapioca"
diff --git a/Gemfile.lock b/Gemfile.lock
index d01fe72..c2ffabc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,3 +1,11 @@
+GIT
+  remote: https://github.com/tenderlove/tldr.git
+  revision: 94b2835ba7e1ee10b80df6328ca599823608dfbe
+  specs:
+    tldr (0.1.0)
+      concurrent-ruby (~> 1.2)
+      super_diff (~> 0.10)
+
 PATH
   remote: .
   specs:
@@ -9,23 +17,23 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    attr_extras (7.1.0)
     base64 (0.1.1)
+    concurrent-ruby (1.2.2)
     diff-lcs (1.5.0)
     docile (1.4.0)
     erubi (1.12.0)
     json (2.6.3)
     language_server-protocol (3.17.0.3)
     lint_roller (1.1.0)
-    m (1.6.1)
-      method_source (>= 0.6.7)
-      rake (>= 0.9.2.2)
-    method_source (1.0.0)
-    minitest (5.19.0)
     netrc (0.11.0)
+    optimist (3.1.0)
     parallel (1.23.0)
     parser (3.2.2.3)
       ast (~> 2.4.1)
       racc
+    patience_diff (1.2.0)
+      optimist (~> 3.0)
     prettier_print (1.2.1)
     racc (1.7.1)
     rainbow (3.1.1)
@@ -100,6 +108,10 @@ GEM
     standard-sorbet (0.0.2)
       lint_roller (~> 1.1)
       rubocop-sorbet (~> 0.7.0)
+    super_diff (0.10.0)
+      attr_extras (>= 6.2.4)
+      diff-lcs
+      patience_diff
     syntax_tree (6.1.1)
       prettier_print (>= 1.2.0)
     tapioca (0.11.8)
@@ -126,8 +138,6 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  m
-  minitest
   mocktail!
   rake
   rubocop-sorbet
@@ -137,6 +147,7 @@ DEPENDENCIES
   standard
   standard-sorbet
   tapioca
+  tldr!
 
 BUNDLED WITH
    2.3.6
diff --git a/Rakefile b/Rakefile
index bc6c315..600f116 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,10 +1,4 @@
 require "bundler/gem_tasks"
-require "rake/testtask"
 require "standard/rake"
 
-Rake::TestTask.new(:test) do |t|
-  t.libs << "test"
-  t.test_files = FileList["test/**/*_test.rb"]
-end
-
-task default: [:test, "standard:fix"]
+task default: ["standard:fix"]
diff --git a/script/test b/script/test
index 1bb96c2..5150f2a 100755
--- a/script/test
+++ b/script/test
@@ -2,8 +2,11 @@
 
 set -xeuo pipefail
 
+echo "-----> Running Standard Ruby"
+bundle exec rake standard:fix
+
 echo "-----> Running Mocktail's test against src"
-COVER=true bundle exec rake
+COVER=true bundle exec tldr
 
 echo "-----> Type-checking Mocktail source"
 bundle exec srb tc
@@ -12,10 +15,10 @@ echo "-----> Building src/mocktail into lib/mocktail and lib/mocktail/sorbet"
 ./script/build
 
 echo "-----> Running Mocktail's test against lib"
-MOCKTAIL_TEST_SRC_DIRECTORY="lib" bundle exec rake
+MOCKTAIL_TEST_SRC_DIRECTORY="lib" bundle exec tldr
 
 echo "-----> Running Mocktail's test against lib/mocktail/sorbet"
-MOCKTAIL_TEST_SRC_DIRECTORY="lib/mocktail/sorbet" bundle exec rake
+MOCKTAIL_TEST_SRC_DIRECTORY="lib/mocktail/sorbet" bundle exec tldr
 
 echo "-----> Ensuring that double-requiring Mocktail produces the right warning and bails out of redefining constants"
 script/test_double_require_warnings
diff --git a/test/test_helper.rb b/test/helper.rb
similarity index 93%
rename from test/test_helper.rb
rename to test/helper.rb
index d941f53..9f39b47 100644
--- a/test/test_helper.rb
+++ b/test/helper.rb
@@ -11,7 +11,6 @@
 
 $LOAD_PATH.unshift File.expand_path("../#{ENV["MOCKTAIL_TEST_SRC_DIRECTORY"] || "src"}", __dir__)
 require "mocktail"
-require "minitest/autorun"
 
 # T is not defined yet, so we can't use T.unsafe to pass typechecking
 if eval("Mocktail::TYPED", binding, __FILE__, __LINE__)
@@ -19,14 +18,14 @@
 else
   require_relative "support/sorbet_stubs"
 end
+require "tldr"
 
-class Minitest::Test
+class TLDR
   extend T::Sig
+  include TLDR::Assertions::MinitestCompatibility
 
   protected
 
-  make_my_diffs_pretty!
-
   sig { params(blk: T.proc.void).returns(Thread) }
   def thread(&blk)
     Thread.new(&blk).tap do |t|
diff --git a/test/mocktail_test.rb b/test/mocktail_test.rb
index 0b5eef3..338118f 100644
--- a/test/mocktail_test.rb
+++ b/test/mocktail_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class MocktailTest < Minitest::Test
+class MocktailTest < TLDR
   extend T::Sig
 
   sig { void }
diff --git a/test/safe/call_count_test.rb b/test/safe/call_count_test.rb
index e8d1d1d..b417ef5 100644
--- a/test/safe/call_count_test.rb
+++ b/test/safe/call_count_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class CallCountTest < Minitest::Test
+class CallCountTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/dsl_test.rb b/test/safe/dsl_test.rb
index e6d067e..8b70c59 100644
--- a/test/safe/dsl_test.rb
+++ b/test/safe/dsl_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class DslTest < Minitest::Test
+class DslTest < TLDR
   extend T::Sig
 
   sig { void }
diff --git a/test/safe/explain_test.rb b/test/safe/explain_test.rb
index 907683c..32c5983 100644
--- a/test/safe/explain_test.rb
+++ b/test/safe/explain_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class ExplainTest < Minitest::Test
+class ExplainTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
@@ -41,7 +39,7 @@ def test_explain_stub_returned_nil
 
       The call site:
 
-        #{__FILE__}:25:in `test_explain_stub_returned_nil'
+        #{__FILE__}:23:in `test_explain_stub_returned_nil'
 
       No stubbings were configured on this method.
 
@@ -75,7 +73,7 @@ def test_explain_stub_returned_nil_with_stubbings
 
       The call site:
 
-        #{__FILE__}:56:in `test_explain_stub_returned_nil_with_stubbings'
+        #{__FILE__}:54:in `test_explain_stub_returned_nil_with_stubbings'
 
       Stubbings configured prior to this call but not satisfied by it:
 
diff --git a/test/safe/kwargs_vs_options_hash_test.rb b/test/safe/kwargs_vs_options_hash_test.rb
index d442db4..8444bfc 100644
--- a/test/safe/kwargs_vs_options_hash_test.rb
+++ b/test/safe/kwargs_vs_options_hash_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class KwargsVsOptionsHashTest < Minitest::Test
+class KwargsVsOptionsHashTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/mocking_methodful_classes_test.rb b/test/safe/mocking_methodful_classes_test.rb
index 7473830..49489d2 100644
--- a/test/safe/mocking_methodful_classes_test.rb
+++ b/test/safe/mocking_methodful_classes_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class MockingMethodfulClassesTest < Minitest::Test
+class MockingMethodfulClassesTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/of_next_test.rb b/test/safe/of_next_test.rb
index daca31c..2f36332 100644
--- a/test/safe/of_next_test.rb
+++ b/test/safe/of_next_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class OfNextTest < Minitest::Test
+class OfNextTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/of_test.rb b/test/safe/of_test.rb
index 5dfa6f9..33678b6 100644
--- a/test/safe/of_test.rb
+++ b/test/safe/of_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class OfTest < Minitest::Test
+class OfTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/replace_test.rb b/test/safe/replace_test.rb
index f8b48d2..62456e3 100644
--- a/test/safe/replace_test.rb
+++ b/test/safe/replace_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class ReplaceTest < Minitest::Test
+class ReplaceTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/reset_test.rb b/test/safe/reset_test.rb
index 75998e3..dd32de0 100644
--- a/test/safe/reset_test.rb
+++ b/test/safe/reset_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class ResetTest < Minitest::Test
+class ResetTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
diff --git a/test/safe/stub_test.rb b/test/safe/stub_test.rb
index f8eb393..d42ea4a 100644
--- a/test/safe/stub_test.rb
+++ b/test/safe/stub_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class StubTest < Minitest::Test
+class StubTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
@@ -322,7 +320,7 @@ def test_param_checking
     }, "Library paths should not appear in backtrace:\n#{e.backtrace.join("\n")}"
 
     # Make sure the message contains the call
-    assert_equal "missing keyword: :and [Mocktail call: `do(1, 2, also: 3) { Proc at test/safe/stub_test.rb:318 }']", e.message
+    assert_equal "missing keyword: :and [Mocktail call: `do(1, 2, also: 3) { Proc at test/safe/stub_test.rb:316 }']", e.message
 
     # Make sure it doesn't raise:
     does_too_much.do(1, and: 2)
diff --git a/test/safe/verify_test.rb b/test/safe/verify_test.rb
index 14054dc..e5a5109 100644
--- a/test/safe/verify_test.rb
+++ b/test/safe/verify_test.rb
@@ -1,8 +1,6 @@
 # typed: strict
 
-require "test_helper"
-
-class VerifyTest < Minitest::Test
+class VerifyTest < TLDR
   include Mocktail::DSL
   extend T::Sig
 
@@ -120,13 +118,13 @@ def test_blocks
     assert_equal <<~MSG, e.message
       Expected mocktail of `VerifyTest::Syn#ack' to be called like:
 
-        ack(:apple, b: :banana) { Proc at test/safe/verify_test.rb:117 }
+        ack(:apple, b: :banana) { Proc at test/safe/verify_test.rb:115 }
 
       It was called differently 2 times:
 
-        ack(:apple, b: :banana) { Proc at test/safe/verify_test.rb:109 }
+        ack(:apple, b: :banana) { Proc at test/safe/verify_test.rb:107 }
 
-        ack(:apple, b: :banana) { Proc at test/safe/verify_test.rb:110 }
+        ack(:apple, b: :banana) { Proc at test/safe/verify_test.rb:108 }
 
     MSG
   end
@@ -175,7 +173,7 @@ def test_verify_that_ignores_unspecified_blocks
 
       It was called differently 1 time:
 
-        ack(42) { Proc at test/safe/verify_test.rb:164 }
+        ack(42) { Proc at test/safe/verify_test.rb:162 }
 
     MSG
   end
diff --git a/test/unit/imitates_type/makes_double/declares_dry_class_test.rb b/test/unit/imitates_type/makes_double/declares_dry_class_test.rb
index 9cf9401..e064385 100644
--- a/test/unit/imitates_type/makes_double/declares_dry_class_test.rb
+++ b/test/unit/imitates_type/makes_double/declares_dry_class_test.rb
@@ -1,16 +1,12 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class DeclaresDryClassTest < Minitest::Test
+  class DeclaresDryClassTest < TLDR
     include Mocktail::DSL
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(DeclaresDryClass.new, DeclaresDryClass)
     end
 
diff --git a/test/unit/matcher_presentation_test.rb b/test/unit/matcher_presentation_test.rb
index 5fc32ad..c4869ed 100644
--- a/test/unit/matcher_presentation_test.rb
+++ b/test/unit/matcher_presentation_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class MatcherPresentationTest < Minitest::Test
+  class MatcherPresentationTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(MatcherPresentation.new, MatcherPresentation)
     end
 
diff --git a/test/unit/matchers/base_test.rb b/test/unit/matchers/base_test.rb
index 8e7491a..8e93a63 100644
--- a/test/unit/matchers/base_test.rb
+++ b/test/unit/matchers/base_test.rb
@@ -1,9 +1,7 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail::Matchers
-  class BaseTest < Minitest::Test
+  class BaseTest < TLDR
     extend T::Sig
 
     sig { void }
diff --git a/test/unit/matchers/captor_test.rb b/test/unit/matchers/captor_test.rb
index cd69c78..b82ec9f 100644
--- a/test/unit/matchers/captor_test.rb
+++ b/test/unit/matchers/captor_test.rb
@@ -1,9 +1,7 @@
 # typed: true
 
-require "test_helper"
-
 module Mocktail::Matchers
-  class CaptorTest < Minitest::Test
+  class CaptorTest < TLDR
     extend T::Sig
 
     sig { void }
diff --git a/test/unit/matchers/includes_test.rb b/test/unit/matchers/includes_test.rb
index 5a4b84e..3d5bfb8 100644
--- a/test/unit/matchers/includes_test.rb
+++ b/test/unit/matchers/includes_test.rb
@@ -1,9 +1,7 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail::Matchers
-  class IncludesTest < Minitest::Test
+  class IncludesTest < TLDR
     extend T::Sig
 
     sig { void }
diff --git a/test/unit/matchers/matches_test.rb b/test/unit/matchers/matches_test.rb
index be54876..e604b6c 100644
--- a/test/unit/matchers/matches_test.rb
+++ b/test/unit/matchers/matches_test.rb
@@ -1,7 +1,5 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail::Matchers
   class GoodMatch
     extend T::Sig
@@ -29,7 +27,7 @@ def match?
     end
   end
 
-  class MatchesTest < Minitest::Test
+  class MatchesTest < TLDR
     extend T::Sig
 
     sig { void }
diff --git a/test/unit/matchers/numeric_test.rb b/test/unit/matchers/numeric_test.rb
index 82ceb5d..9c968ed 100644
--- a/test/unit/matchers/numeric_test.rb
+++ b/test/unit/matchers/numeric_test.rb
@@ -1,10 +1,9 @@
 # typed: strict
 
-require "test_helper"
 require "bigdecimal"
 
 module Mocktail::Matchers
-  class NumericTest < Minitest::Test
+  class NumericTest < TLDR
     extend T::Sig
 
     sig { void }
diff --git a/test/unit/matchers/that_test.rb b/test/unit/matchers/that_test.rb
index 5db1a09..68a1e96 100644
--- a/test/unit/matchers/that_test.rb
+++ b/test/unit/matchers/that_test.rb
@@ -1,9 +1,7 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail::Matchers
-  class ThatTest < Minitest::Test
+  class ThatTest < TLDR
     extend T::Sig
 
     sig { void }
diff --git a/test/unit/raises_neato_no_method_error_test.rb b/test/unit/raises_neato_no_method_error_test.rb
index 9a0f221..8dff0b8 100644
--- a/test/unit/raises_neato_no_method_error_test.rb
+++ b/test/unit/raises_neato_no_method_error_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class RaisesNeatoNoMethodErrorTest < Minitest::Test
+  class RaisesNeatoNoMethodErrorTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(RaisesNeatoNoMethodError.new, RaisesNeatoNoMethodError)
     end
 
diff --git a/test/unit/registers_matcher_test.rb b/test/unit/registers_matcher_test.rb
index b54787c..f2355c4 100644
--- a/test/unit/registers_matcher_test.rb
+++ b/test/unit/registers_matcher_test.rb
@@ -1,12 +1,10 @@
 # typed: strict
 
-require "test_helper"
-
-class RegistersMatcherTest < Minitest::Test
+class RegistersMatcherTest < TLDR
   extend T::Sig
 
-  sig { params(name: String).void }
-  def initialize(name)
+  sig { void }
+  def initialize
     super
 
     @subject = T.let(Mocktail::RegistersMatcher.new, Mocktail::RegistersMatcher)
diff --git a/test/unit/share/bind_test.rb b/test/unit/share/bind_test.rb
index 5720602..c59161b 100644
--- a/test/unit/share/bind_test.rb
+++ b/test/unit/share/bind_test.rb
@@ -1,9 +1,7 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class BindTest < Minitest::Test
+  class BindTest < TLDR
     extend T::Sig
 
     class FortyTwo
diff --git a/test/unit/share/creates_identifier_test.rb b/test/unit/share/creates_identifier_test.rb
index c69a9e8..9364c83 100644
--- a/test/unit/share/creates_identifier_test.rb
+++ b/test/unit/share/creates_identifier_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class CreatesIdentifierTest < Minitest::Test
+  class CreatesIdentifierTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(CreatesIdentifier.new, CreatesIdentifier)
     end
 
diff --git a/test/unit/simulates_argument_error/cleans_backtrace_test.rb b/test/unit/simulates_argument_error/cleans_backtrace_test.rb
index 644f7e2..1769325 100644
--- a/test/unit/simulates_argument_error/cleans_backtrace_test.rb
+++ b/test/unit/simulates_argument_error/cleans_backtrace_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class CleansBacktraceTest < Minitest::Test
+  class CleansBacktraceTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(CleansBacktrace.new, CleansBacktrace)
     end
 
diff --git a/test/unit/simulates_argument_error/reconciles_args_with_params_test.rb b/test/unit/simulates_argument_error/reconciles_args_with_params_test.rb
index e702622..8d55f9e 100644
--- a/test/unit/simulates_argument_error/reconciles_args_with_params_test.rb
+++ b/test/unit/simulates_argument_error/reconciles_args_with_params_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class ReconcilesArgsWithParamsTest < Minitest::Test
+  class ReconcilesArgsWithParamsTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(ReconcilesArgsWithParams.new, ReconcilesArgsWithParams)
     end
 
diff --git a/test/unit/simulates_argument_error/recreates_message_test.rb b/test/unit/simulates_argument_error/recreates_message_test.rb
index e202be1..1cabdd0 100644
--- a/test/unit/simulates_argument_error/recreates_message_test.rb
+++ b/test/unit/simulates_argument_error/recreates_message_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class RecreatesMessageTest < Minitest::Test
+  class RecreatesMessageTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(RecreatesMessage.new, RecreatesMessage)
     end
 
diff --git a/test/unit/simulates_argument_error/transforms_params_test.rb b/test/unit/simulates_argument_error/transforms_params_test.rb
index dfac11b..0925805 100644
--- a/test/unit/simulates_argument_error/transforms_params_test.rb
+++ b/test/unit/simulates_argument_error/transforms_params_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class TransformsParamsTest < Minitest::Test
+  class TransformsParamsTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(TransformsParams.new, TransformsParams)
     end
 
diff --git a/test/unit/stringifies_method_signature_test.rb b/test/unit/stringifies_method_signature_test.rb
index 295012f..7e01d26 100644
--- a/test/unit/stringifies_method_signature_test.rb
+++ b/test/unit/stringifies_method_signature_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class StringifiesMethodSignatureTest < Minitest::Test
+  class StringifiesMethodSignatureTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(StringifiesMethodSignature.new, StringifiesMethodSignature)
     end
 
diff --git a/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb b/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb
index e66e374..fe3647c 100644
--- a/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb
+++ b/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb
@@ -1,15 +1,11 @@
 # typed: strict
 
-require "test_helper"
-
 module Mocktail
-  class StringifiesCallTest < Minitest::Test
+  class StringifiesCallTest < TLDR
     extend T::Sig
 
-    sig { params(name: String).void }
-    def initialize(name)
-      super
-
+    sig { void }
+    def initialize
       @subject = T.let(StringifiesCall.new, StringifiesCall)
     end
 
@@ -43,11 +39,11 @@ def test_some_calls
       assert_equal "hi(d: {:e=>4}, f: [:g, {:h=>5}])", invoke(kwargs: {d: {e: 4}, f: [:g, {h: 5}]})
 
       # Blocks & Procs
-      assert_equal "hi { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:46 }", invoke {}
-      assert_equal "hi(&lambda[test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:47])", invoke(&lambda {})
+      assert_equal "hi { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:42 }", invoke {}
+      assert_equal "hi(&lambda[test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:43])", invoke(&lambda {})
 
       # Mix & Match
-      assert_equal "hi(:a, 1, b: 2) { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:50 }", invoke(args: [:a, 1], kwargs: {b: 2}) { |c| 3 }
+      assert_equal "hi(:a, 1, b: 2) { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:46 }", invoke(args: [:a, 1], kwargs: {b: 2}) { |c| 3 }
     end
 
     private