diff --git a/app/models/concerns/attachment_virus_scanner_concern.rb b/app/models/concerns/attachment_virus_scanner_concern.rb
index 217d5e920..832d15a98 100644
--- a/app/models/concerns/attachment_virus_scanner_concern.rb
+++ b/app/models/concerns/attachment_virus_scanner_concern.rb
@@ -15,6 +15,13 @@ module AttachmentVirusScannerConcern
   private
 
   def scan_for_virus_later
-    blob&.scan_for_virus_later
+    return if blob.nil?
+
+    # do not scan if the blob is already marked as safe
+    # usually because of metadata[:virus_scan_result] = ActiveStorage::VirusScanner::SAFE
+    # added on a blob built by the application itself
+    return if blob.virus_scan_result == ActiveStorage::VirusScanner::SAFE
+
+    blob.scan_for_virus_later
   end
 end
diff --git a/db/migrate/20240415192417_drop_virus_scan_table.rb b/db/migrate/20240415192417_drop_virus_scan_table.rb
new file mode 100644
index 000000000..ba400126b
--- /dev/null
+++ b/db/migrate/20240415192417_drop_virus_scan_table.rb
@@ -0,0 +1,5 @@
+class DropVirusScanTable < ActiveRecord::Migration[7.0]
+  def up
+    drop_table :virus_scans
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 8fbba2a1a..743ba4e2a 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2024_04_11_164502) do
+ActiveRecord::Schema[7.0].define(version: 2024_04_15_192417) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_buffercache"
   enable_extension "pg_stat_statements"
@@ -1148,16 +1148,6 @@ ActiveRecord::Schema[7.0].define(version: 2024_04_11_164502) do
     t.index ["unlock_token"], name: "index_users_on_unlock_token", unique: true
   end
 
-  create_table "virus_scans", force: :cascade do |t|
-    t.string "blob_key"
-    t.bigint "champ_id"
-    t.datetime "created_at", precision: nil, null: false
-    t.datetime "scanned_at", precision: nil
-    t.string "status"
-    t.datetime "updated_at", precision: nil, null: false
-    t.index ["champ_id"], name: "index_virus_scans_on_champ_id"
-  end
-
   create_table "without_continuation_mails", id: :serial, force: :cascade do |t|
     t.text "body"
     t.datetime "created_at", precision: nil, null: false
diff --git a/spec/system/instructeurs/instruction_spec.rb b/spec/system/instructeurs/instruction_spec.rb
index a826596dd..d6230e9b5 100644
--- a/spec/system/instructeurs/instruction_spec.rb
+++ b/spec/system/instructeurs/instruction_spec.rb
@@ -139,7 +139,7 @@ describe 'Instructing a dossier:', js: true do
     expect(page).to have_text("Export .csv d’un dossier « à suivre » demandé il y a moins d'une minute")
     expect(page).to have_text("En préparation")
 
-    assert_performed_jobs 2 do
+    assert_performed_jobs 1 do
       perform_enqueued_jobs(only: ExportJob)
     end