diff --git a/.changes/unreleased/Fixes-20230405-124315.yaml b/.changes/unreleased/Fixes-20230405-124315.yaml
new file mode 100644
index 00000000000..8f10984e62e
--- /dev/null
+++ b/.changes/unreleased/Fixes-20230405-124315.yaml
@@ -0,0 +1,6 @@
+kind: Fixes
+body: avoid dbtRunner default callbacks being shared across instances
+time: 2023-04-05T12:43:15.418016-04:00
+custom:
+  Author: chamini2
+  Issue: "7278"
diff --git a/core/dbt/cli/main.py b/core/dbt/cli/main.py
index 5bb0f9ea696..14beb3c4fb7 100644
--- a/core/dbt/cli/main.py
+++ b/core/dbt/cli/main.py
@@ -40,11 +40,14 @@ def __init__(
         project: Project = None,
         profile: Profile = None,
         manifest: Manifest = None,
-        callbacks: List[Callable[[EventMsg], None]] = [],
+        callbacks: List[Callable[[EventMsg], None]] = None,
     ):
         self.project = project
         self.profile = profile
         self.manifest = manifest
+
+        if callbacks is None:
+            callbacks = []
         self.callbacks = callbacks
 
     def invoke(self, args: List[str]) -> Tuple[Optional[List], bool]: