diff --git a/bin/internal/shared.bat b/bin/internal/shared.bat
index d5ddc20c3e9..24e7fd02414 100644
--- a/bin/internal/shared.bat
+++ b/bin/internal/shared.bat
@@ -156,9 +156,9 @@ GOTO :after_subroutine
     POPD
 
     IF "%FLUTTER_TOOL_ARGS%" == "" (
-      "%dart%" --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" --no-enable-mirrors "%script_path%"
+      "%dart%" --verbosity=error --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" --no-enable-mirrors "%script_path%"
     ) else (
-      "%dart%" "%FLUTTER_TOOL_ARGS%" --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" "%script_path%"
+      "%dart%" "%FLUTTER_TOOL_ARGS%" --verbosity=error --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" "%script_path%"
     )
     IF "%ERRORLEVEL%" NEQ "0" (
       ECHO Error: Unable to create dart snapshot for flutter tool. 1>&2
diff --git a/bin/internal/shared.sh b/bin/internal/shared.sh
index de2ca9076e2..c44f8677461 100644
--- a/bin/internal/shared.sh
+++ b/bin/internal/shared.sh
@@ -151,7 +151,7 @@ function upgrade_flutter () (
 
     retry_upgrade
 
-    "$DART" --disable-dart-dev $FLUTTER_TOOL_ARGS --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.packages" --no-enable-mirrors "$SCRIPT_PATH"
+    "$DART" --verbosity=error --disable-dart-dev $FLUTTER_TOOL_ARGS --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.packages" --no-enable-mirrors "$SCRIPT_PATH"
     echo "$revision" > "$STAMP_PATH"
   fi
   # The exit here is extraneous since the function is run in a subshell, but