diff --git a/frontend/docsettings.lua b/frontend/docsettings.lua
index 2537857e3..9cba169aa 100644
--- a/frontend/docsettings.lua
+++ b/frontend/docsettings.lua
@@ -1,6 +1,7 @@
 local lfs = require("libs/libkoreader-lfs")
 local DataStorage = require("datastorage")
 local dump = require("dump")
+local purgeDir = require("ffi/util").purgeDir
 
 local DocSettings = {}
 
@@ -29,6 +30,11 @@ function DocSettings:getNameFromHistory(hist_name)
     return string.sub(hist_name, s+2, -5)
 end
 
+function DocSettings:purgeDocSettings(doc_path)
+    purgeDir(self:getSidecarDir(doc_path))
+    os.remove(self:getHistoryPath(doc_path))
+end
+
 function DocSettings:open(docfile)
     local history_path
     local sidecar_path
diff --git a/spec/unit/commonrequire.lua b/spec/unit/commonrequire.lua
index 9ebb11204..244305401 100644
--- a/spec/unit/commonrequire.lua
+++ b/spec/unit/commonrequire.lua
@@ -49,4 +49,3 @@ function assertNotAlmostEquals(expected, actual, margin)
             .. ', received: ' .. actual
     )
 end
-
diff --git a/spec/unit/readerbookmark_spec.lua b/spec/unit/readerbookmark_spec.lua
index 66d6f5a75..61a8d859d 100644
--- a/spec/unit/readerbookmark_spec.lua
+++ b/spec/unit/readerbookmark_spec.lua
@@ -1,9 +1,10 @@
 describe("ReaderBookmark module #ok", function()
-    local DocumentRegistry, ReaderUI, UIManager, Screen, Geom, DEBUG
+    local DocumentRegistry, ReaderUI, UIManager, Screen, Geom, DEBUG, DocSettings
     local sample_epub, sample_pdf
 
     setup(function()
         require("commonrequire")
+        DocSettings = require("docsettings")
         DocumentRegistry = require("document/documentregistry")
         ReaderUI = require("apps/reader/readerui")
         UIManager = require("ui/uimanager")
@@ -46,6 +47,7 @@ describe("ReaderBookmark module #ok", function()
         local page = 10
         local readerui
         setup(function()
+            DocSettings:purgeDocSettings(sample_epub)
             readerui = ReaderUI:new{
                 document = DocumentRegistry:openDocument(sample_epub),
             }
@@ -120,6 +122,7 @@ describe("ReaderBookmark module #ok", function()
     describe("bookmark for PDF document", function()
         local readerui
         setup(function()
+            DocSettings:purgeDocSettings(sample_pdf)
             readerui = ReaderUI:new{
                 document = DocumentRegistry:openDocument(sample_pdf),
             }