diff --git a/check50/__main__.py b/check50/__main__.py
index 16148b63..41fc6cae 100644
--- a/check50/__main__.py
+++ b/check50/__main__.py
@@ -79,7 +79,7 @@ def excepthook(cls, exc, tb):
             if excepthook.verbose:
                 traceback.print_exception(cls, exc, tb)
                 if hasattr(exc, "payload"):
-                    print("Exception payload:", exc.payload)
+                    print("Exception payload:", json.dumps(exc.payload), sep="\n")
 
     sys.exit(1)
 
diff --git a/check50/_api.py b/check50/_api.py
index 9ff2b85f..de84151c 100644
--- a/check50/_api.py
+++ b/check50/_api.py
@@ -263,7 +263,7 @@ def stdout(self, output=None, str_output=None, regex=True, timeout=3):
                 result += self.process.after
             raise Mismatch(str_output, result.replace("\r\n", "\n"))
         except TIMEOUT:
-            raise Failure(_("did not find \"{}\"").format(_raw(str_output)))
+            raise Failure(_("did not find {}").format(_raw(str_output)))
         except UnicodeDecodeError:
             raise Failure(_("output not valid ASCII text"))
         except Exception:
@@ -402,7 +402,14 @@ class Mismatch(Failure):
     """
 
     def __init__(self, expected, actual, help=None):
-        super().__init__(rationale=_("expected \"{}\", not \"{}\"").format(_raw(expected), _raw(actual)), help=help)
+        super().__init__(rationale=_("expected {}, not {}").format(_raw(expected), _raw(actual)), help=help)
+
+        if expected == EOF:
+            expected = "EOF"
+
+        if actual == EOF:
+            actual = "EOF"
+
         self.payload.update({"expected": expected, "actual": actual})
 
 
@@ -445,8 +452,7 @@ def _raw(s):
     if s == EOF:
         return "EOF"
 
-    s = repr(s)  # Get raw representation of string
-    s = s[1:-1]  # Strip away quotation marks
+    s = f'"{repr(s)[1:-1]}"'
     if len(s) > 15:
         s = s[:15] + "..."  # Truncate if too long
     return s
diff --git a/check50/_simple.py b/check50/_simple.py
index 3b2a30f5..9339b052 100644
--- a/check50/_simple.py
+++ b/check50/_simple.py
@@ -22,16 +22,16 @@ def _run(arg):
 
 def _stdin(arg):
     if isinstance(arg, list):
-        arg = r"\n".join(arg)
+        arg = r"\n".join(str(a) for a in arg)
 
-    arg = arg.replace("\n", r"\n").replace("\t", r"\t").replace('"', '\"')
+    arg = str(arg).replace("\n", r"\n").replace("\t", r"\t").replace('"', '\"')
     return f'.stdin("{arg}", prompt=False)'
 
 
 def _stdout(arg):
     if isinstance(arg, list):
-        arg = r"\n".join(arg)
-    arg = arg.replace("\n", r"\n").replace("\t", r"\t").replace('"', '\"')
+        arg = r"\n".join(str(a) for a in arg)
+    arg = str(arg).replace("\n", r"\n").replace("\t", r"\t").replace('"', '\"')
     return f'.stdout("{arg}", regex=False)'
 
 
diff --git a/check50/renderer/_renderers.py b/check50/renderer/_renderers.py
index 71ebb26f..53512dd2 100644
--- a/check50/renderer/_renderers.py
+++ b/check50/renderer/_renderers.py
@@ -1,14 +1,10 @@
 import json
 import pathlib
 
-import attr
 import jinja2
 import pkg_resources
-from pexpect.exceptions import EOF
 import termcolor
 
-from ..runner import CheckResult
-
 TEMPLATES = pathlib.Path(pkg_resources.resource_filename("check50.renderer", "templates"))
 
 
diff --git a/setup.py b/setup.py
index fa0d9680..a41d05c9 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,6 @@
         "console_scripts": ["check50=check50.__main__:main"]
     },
     url="https://github.com/cs50/check50",
-    version="3.0.7",
+    version="3.0.8",
     include_package_data=True
 )