   end
 
   test :refute_in_delta_fail do
-    try do
-      "This should never be tested" = refute_in_delta(10, 11, 2)
-    rescue
-      error in [ExUnit.AssertionError] ->
-        "Expected |10 - 11| (1) to not be < 2" = error.message
-    end
+    "This should never be tested" = refute_in_delta(10, 11, 2)
+  rescue
+    error in [ExUnit.AssertionError] ->
+      "Expected |10 - 11| (1) to not be < 2" = error.message
   end
 
   test :refute_in_delta_with_message do
-    try do
-      "This should never be tested" = refute_in_delta(10, 11, 2, "test message")
-    rescue
-      error in [ExUnit.AssertionError] ->
-        "test message" = error.message
-    end
+    "This should never be tested" = refute_in_delta(10, 11, 2, "test message")
+  rescue
+    error in [ExUnit.AssertionError] ->
+      "test message" = error.message
   end
 
   test :catch_throw_when_no_throw do
-    try do
-      catch_throw(1)
-    rescue
-      error in [ExUnit.AssertionError] ->
-        "Expected to catch throw, got nothing" = error.message
-    end
+    catch_throw(1)
+  rescue
+    error in [ExUnit.AssertionError] ->
+      "Expected to catch throw, got nothing" = error.message
   end
 
   test :catch_error_when_no_error do
-    try do
-      catch_error(1)
-    rescue
-      error in [ExUnit.AssertionError] ->
-        "Expected to catch error, got nothing" = error.message
-    end
+    catch_error(1)
+  rescue
+    error in [ExUnit.AssertionError] ->
+      "Expected to catch error, got nothing" = error.message
   end
 
   test :catch_exit_when_no_exit do
-    try do
-      catch_exit(1)
-    rescue
-      error in [ExUnit.AssertionError] ->
-        "Expected to catch exit, got nothing" = error.message
-    end
+    catch_exit(1)
+  rescue
+    error in [ExUnit.AssertionError] ->
+      "Expected to catch exit, got nothing" = error.message
   end
 
   test :catch_throw_when_throw do

  end

  test :assert_raise_when_other_error do
    try do
      "This should never be tested" = assert_raise ArgumentError, fn ->
        Certainly.Undefined.function(1,2,3)
      end
    rescue
      error in [ExUnit.AssertionError] ->
        "Expected exception ArgumentError, got UndefinedFunctionError (undefined function: Certainly.Undefined.function/3)" = error.message
    end
  end

  test :assert_raise_when_erlang_error do
    try do
      assert_raise SyntaxError, fn ->
        List.flatten(1)
      end
    rescue
      error in [ExUnit.AssertionError] ->
        "Expected exception SyntaxError, got FunctionClauseError (no function clause matching: :lists.flatten(1))" = error.message
    end
  end

  test :assert_operator_greater_pass do

  end

  test :assert_in_delta_fail do
    "This should never be tested" = assert_in_delta(10, 12, 1)
  rescue
    error in [ExUnit.AssertionError] ->
      "Expected |10 - 12| (2) to be < 1" = error.message
  end

  test :assert_in_delta_with_message do
    "This should never be tested" = assert_in_delta(10, 12, 1, "test message")
  rescue
    error in [ExUnit.AssertionError] ->
      "test message" = error.message
  end

  test :refute_in_delta_pass do
