diff --git a/craft_parts/errors.py b/craft_parts/errors.py
index b31196fdf..029447dc2 100644
--- a/craft_parts/errors.py
+++ b/craft_parts/errors.py
@@ -52,15 +52,7 @@ def __init__(
         self.doc_slug = doc_slug
 
     def __str__(self) -> str:
-        components = [self.brief]
-
-        if self.details:
-            components.append(self.details)
-
-        if self.resolution:
-            components.append(self.resolution)
-
-        return "\n".join(components)
+        return self.brief
 
     def __repr__(self) -> str:
         return f"{self.__class__.__name__}(brief={self.brief!r}, details={self.details!r}, resolution={self.resolution!r}, doc_slug={self.doc_slug!r})"
diff --git a/tests/unit/test_errors.py b/tests/unit/test_errors.py
index 40e8f1db7..bb03234a9 100644
--- a/tests/unit/test_errors.py
+++ b/tests/unit/test_errors.py
@@ -36,7 +36,7 @@ def test_parts_error_brief():
 
 def test_parts_error_full():
     err = errors.PartsError(brief="Brief", details="Details", resolution="Resolution")
-    assert str(err) == "Brief\nDetails\nResolution"
+    assert str(err) == "Brief"
     assert (
         repr(err)
         == "PartsError(brief='Brief', details='Details', resolution='Resolution', doc_slug=None)"