diff --git a/functions/fisher.fish b/functions/fisher.fish
index 4f5be4ff..ea744c46 100644
--- a/functions/fisher.fish
+++ b/functions/fisher.fish
@@ -137,6 +137,28 @@ function fisher --argument-names cmd --description "A plugin manager for Fish"
                 end
             end
 
+            for plugin in $update_plugins
+                set --local source $source_plugins[(contains --index -- "$plugin" $fetch_plugins)]
+                set --local plugin_files_var _fisher_(string escape --style=var -- $plugin)_files
+                set --local installed_files (string replace -- \~ ~ $$plugin_files_var)
+                set --local source_files $source/{functions,themes,conf.d,completions}/*
+                set --local changed
+
+                for relative_path in (
+                    printf "%s\n" \
+                        (string replace -- "$fisher_path/" "" $installed_files) \
+                        (string replace -- "$source/" "" $source_files) |
+                    sort --unique
+                )
+                    if not command diff -qrN $source/$relative_path $fisher_path/$relative_path &>/dev/null
+                        set changed 1
+                        break
+                    end
+                end
+
+                set --query changed[1] || set --erase update_plugins[(contains --index -- "$plugin" $update_plugins)]
+            end
+
             for plugin in $update_plugins $remove_plugins
                 if set --local index (contains --index -- "$plugin" $_fisher_plugins)
                     set --local plugin_files_var _fisher_(string escape --style=var -- $plugin)_files
diff --git a/tests/fisher.fish b/tests/fisher.fish
index 1e352b67..87cd0e85 100644
--- a/tests/fisher.fish
+++ b/tests/fisher.fish
@@ -18,7 +18,30 @@ set --local BASENAME --regex -- '[^/]+$'
 
 @test "fisher update" (
     fisher update tests/ponyo >/dev/null
-) "$ponyo" = "pyon pyon pyon"
+) "$ponyo" = "pyon pyon"
+
+@test "fisher update unchanged output is quiet" (
+    set --local plugin (command mktemp -d)
+    command mkdir -p $plugin/functions
+    printf "function test_plugin\n    echo unchanged\nend\n" >$plugin/functions/test_plugin.fish
+    fisher install $plugin >/dev/null
+    set --local output (fisher update $plugin)
+    fisher remove $plugin >/dev/null
+    string match --quiet --entire -- "Updated" $output
+    or echo ok
+) = ok
+
+@test "fisher update changed output" (
+    set --local plugin (command mktemp -d)
+    command mkdir -p $plugin/functions
+    printf "function test_plugin\n    echo before\nend\n" >$plugin/functions/test_plugin.fish
+    fisher install $plugin >/dev/null
+    printf "function test_plugin\n    echo after\nend\n" >$plugin/functions/test_plugin.fish
+    set --local output (fisher update $plugin)
+    fisher remove $plugin >/dev/null
+    string match --quiet --regex "(^|\\n)Updated 1 plugin/s\$" -- $output
+    and echo ok
+) = ok
 
 @test fish_plugins (
     string match --regex -- "[^/]+\$" <$__fish_config_dir/fish_plugins | string join " "