diff --git a/analysis_options.yaml b/analysis_options.yaml
index 3989e50e6d..d51b2bffaf 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -51,7 +51,7 @@ linter:
     - always_specify_types
     - annotate_overrides
     # - avoid_annotating_with_dynamic # conflicts with always_specify_types
-    - avoid_as
+    # - avoid_as # required for implicit-casts: true
     - avoid_bool_literals_in_conditional_expressions
     # - avoid_catches_without_on_clauses # we do this commonly
     # - avoid_catching_errors # we do this commonly
diff --git a/packages/flutter_goldens/analysis_options.yaml b/packages/flutter_goldens/analysis_options.yaml
index 6c17382413..b9d57a9e11 100644
--- a/packages/flutter_goldens/analysis_options.yaml
+++ b/packages/flutter_goldens/analysis_options.yaml
@@ -7,7 +7,3 @@ analyzer:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
-
-linter:
-  rules:
-    avoid_as: false # Disabled so we can gradually migrate to no implicit dynamic.
diff --git a/packages/flutter_goldens_client/analysis_options.yaml b/packages/flutter_goldens_client/analysis_options.yaml
index 6c17382413..b9d57a9e11 100644
--- a/packages/flutter_goldens_client/analysis_options.yaml
+++ b/packages/flutter_goldens_client/analysis_options.yaml
@@ -7,7 +7,3 @@ analyzer:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
-
-linter:
-  rules:
-    avoid_as: false # Disabled so we can gradually migrate to no implicit dynamic.
diff --git a/packages/flutter_test/analysis_options.yaml b/packages/flutter_test/analysis_options.yaml
index e17b1641d4..3de2cb2e1a 100644
--- a/packages/flutter_test/analysis_options.yaml
+++ b/packages/flutter_test/analysis_options.yaml
@@ -4,7 +4,3 @@ analyzer:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
-
-linter:
-  rules:
-    avoid_as: false # Disabled so we can gradually migrate to no implicit dynamic.
diff --git a/packages/flutter_tools/analysis_options.yaml b/packages/flutter_tools/analysis_options.yaml
index 57ae20d284..9d30761275 100644
--- a/packages/flutter_tools/analysis_options.yaml
+++ b/packages/flutter_tools/analysis_options.yaml
@@ -11,5 +11,4 @@ analyzer:
 linter:
   rules:
     unawaited_futures: true
-    avoid_as: false # Disabled so we can gradually migrate to no implicit dynamic.
     curly_braces_in_flow_control_structures: true
diff --git a/packages/flutter_web_plugins/analysis_options.yaml b/packages/flutter_web_plugins/analysis_options.yaml
index 2344f5ab1f..a08bda2904 100644
--- a/packages/flutter_web_plugins/analysis_options.yaml
+++ b/packages/flutter_web_plugins/analysis_options.yaml
@@ -6,7 +6,3 @@ analyzer:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
-
-linter:
-  rules:
-    avoid_as: false
diff --git a/packages/fuchsia_remote_debug_protocol/analysis_options.yaml b/packages/fuchsia_remote_debug_protocol/analysis_options.yaml
index 2344f5ab1f..a08bda2904 100644
--- a/packages/fuchsia_remote_debug_protocol/analysis_options.yaml
+++ b/packages/fuchsia_remote_debug_protocol/analysis_options.yaml
@@ -6,7 +6,3 @@ analyzer:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
-
-linter:
-  rules:
-    avoid_as: false