diff --git a/core/dbt/events/adapter_endpoint.py b/core/dbt/events/adapter_endpoint.py
index 8c9f80b8655..6979256d377 100644
--- a/core/dbt/events/adapter_endpoint.py
+++ b/core/dbt/events/adapter_endpoint.py
@@ -13,7 +13,7 @@ class AdapterLogger:
     name: str
 
     def debug(self, msg, *args, exc_info=None, extra=None, stack_info=False):
-        event = AdapterEventDebug(name=self.name, base_msg=str(msg), args=args)
+        event = AdapterEventDebug(name=self.name, base_msg=msg, args=args)
 
         event.exc_info = exc_info
         event.extra = extra
@@ -22,7 +22,7 @@ def debug(self, msg, *args, exc_info=None, extra=None, stack_info=False):
         fire_event(event)
 
     def info(self, msg, *args, exc_info=None, extra=None, stack_info=False):
-        event = AdapterEventInfo(name=self.name, base_msg=str(msg), args=args)
+        event = AdapterEventInfo(name=self.name, base_msg=msg, args=args)
 
         event.exc_info = exc_info
         event.extra = extra
@@ -31,7 +31,7 @@ def info(self, msg, *args, exc_info=None, extra=None, stack_info=False):
         fire_event(event)
 
     def warning(self, msg, *args, exc_info=None, extra=None, stack_info=False):
-        event = AdapterEventWarning(name=self.name, base_msg=str(msg), args=args)
+        event = AdapterEventWarning(name=self.name, base_msg=msg, args=args)
 
         event.exc_info = exc_info
         event.extra = extra
@@ -40,7 +40,7 @@ def warning(self, msg, *args, exc_info=None, extra=None, stack_info=False):
         fire_event(event)
 
     def error(self, msg, *args, exc_info=None, extra=None, stack_info=False):
-        event = AdapterEventError(name=self.name, base_msg=str(msg), args=args)
+        event = AdapterEventError(name=self.name, base_msg=msg, args=args)
 
         event.exc_info = exc_info
         event.extra = extra
@@ -50,7 +50,7 @@ def error(self, msg, *args, exc_info=None, extra=None, stack_info=False):
 
     # The default exc_info=True is what makes this method different
     def exception(self, msg, *args, exc_info=True, extra=None, stack_info=False):
-        event = AdapterEventError(name=self.name, base_msg=str(msg), args=args)
+        event = AdapterEventError(name=self.name, base_msg=msg, args=args)
 
         event.exc_info = exc_info
         event.extra = extra
@@ -59,7 +59,7 @@ def exception(self, msg, *args, exc_info=True, extra=None, stack_info=False):
         fire_event(event)
 
     def critical(self, msg, *args, exc_info=False, extra=None, stack_info=False):
-        event = AdapterEventError(name=self.name, base_msg=str(msg), args=args)
+        event = AdapterEventError(name=self.name, base_msg=msg, args=args)
 
         event.exc_info = exc_info
         event.extra = extra
diff --git a/core/dbt/events/base_types.py b/core/dbt/events/base_types.py
index ce33b4955c4..c3c427a9733 100644
--- a/core/dbt/events/base_types.py
+++ b/core/dbt/events/base_types.py
@@ -104,6 +104,13 @@ def level_tag(self) -> str:
         return "error"
 
 
+@dataclass  # type: ignore[misc]
+class MessageStringifier:
+    def __post_init__(self):
+        if not isinstance(self.msg, str):
+            self.msg = str(self.msg)
+
+
 # prevents an event from going to the file
 # This should rarely be used in core code. It is currently
 # only used in integration tests and for the 'clean' command.
diff --git a/core/dbt/events/types.py b/core/dbt/events/types.py
index 9479074b6e1..66c316024b3 100644
--- a/core/dbt/events/types.py
+++ b/core/dbt/events/types.py
@@ -12,6 +12,7 @@
     ShowException,
     NodeInfo,
     Cache,
+    MessageStringifier,
 )
 from dbt.events.format import format_fancy_output_line, pluralize
 from dbt.events.serialization import EventSerialization
@@ -56,6 +57,9 @@ class AdapterEventBase(EventSerialization, Event):
     base_msg: str
     args: Tuple[Any, ...]
 
+    def __post_init__(self):
+        self.base_msg = str(self.base_msg)
+
     # instead of having this inherit from one of the level classes
     def level_tag(self) -> str:
         raise Exception("level_tag should never be called on AdapterEventBase")
@@ -443,7 +447,7 @@ def message(self) -> str:
 
 
 @dataclass
-class MacroEventInfo(InfoLevel):
+class MacroEventInfo(InfoLevel, MessageStringifier):
     msg: str
     code: str = "M011"
 
@@ -452,7 +456,7 @@ def message(self) -> str:
 
 
 @dataclass
-class MacroEventDebug(DebugLevel):
+class MacroEventDebug(DebugLevel, MessageStringifier):
     msg: str
     code: str = "M012"
 
@@ -1204,7 +1208,7 @@ def message(self) -> str:
 
 
 @dataclass
-class InvalidDisabledSourceInTestNode(WarnLevel):
+class InvalidDisabledSourceInTestNode(WarnLevel, MessageStringifier):
     msg: str
     code: str = "I050"
 
@@ -1213,7 +1217,7 @@ def message(self) -> str:
 
 
 @dataclass
-class InvalidRefInTestNode(DebugLevel):
+class InvalidRefInTestNode(DebugLevel, MessageStringifier):
     msg: str
     code: str = "I051"
 
@@ -1641,7 +1645,7 @@ def message(self) -> str:
 
 
 @dataclass
-class RunResultWarningMessage(WarnLevel):
+class RunResultWarningMessage(WarnLevel, MessageStringifier):
     msg: str
     code: str = "Z049"
 
@@ -1672,7 +1676,7 @@ def message(self) -> str:
 
 
 @dataclass
-class RunResultError(ErrorLevel):
+class RunResultError(ErrorLevel, MessageStringifier):
     msg: str
     code: str = "Z024"
 
@@ -1719,7 +1723,7 @@ def message(self) -> str:
 
 
 @dataclass
-class FirstRunResultError(ErrorLevel):
+class FirstRunResultError(ErrorLevel, MessageStringifier):
     msg: str
     code: str = "Z028"
 
@@ -1728,7 +1732,7 @@ def message(self) -> str:
 
 
 @dataclass
-class AfterFirstRunResultError(ErrorLevel):
+class AfterFirstRunResultError(ErrorLevel, MessageStringifier):
     msg: str
     code: str = "Z029"
 
@@ -2310,7 +2314,7 @@ def message(self) -> str:
 
 
 @dataclass
-class GetAddendum(InfoLevel):
+class GetAddendum(InfoLevel, MessageStringifier):
     msg: str
     code: str = "A026"
 
@@ -2447,7 +2451,7 @@ def message(self) -> str:
 
 
 @dataclass
-class GeneralWarningMsg(WarnLevel):
+class GeneralWarningMsg(WarnLevel, MessageStringifier):
     msg: str
     log_fmt: str
     code: str = "Z046"