diff --git a/dangerzone/isolation_provider/base.py b/dangerzone/isolation_provider/base.py
index a855f34..8ad64f1 100644
--- a/dangerzone/isolation_provider/base.py
+++ b/dangerzone/isolation_provider/base.py
@@ -126,7 +126,7 @@ class IsolationProvider(ABC):
         return pixmap.pdfocr_tobytes(
             compress=True,
             language=ocr_lang,
-            tessdata=get_tessdata_dir(),
+            tessdata=str(get_tessdata_dir()),
         )
 
     def pixels_to_pdf_page(
diff --git a/dangerzone/util.py b/dangerzone/util.py
index ef86664..200f25c 100644
--- a/dangerzone/util.py
+++ b/dangerzone/util.py
@@ -1,4 +1,3 @@
-import os
 import pathlib
 import platform
 import subprocess
@@ -34,23 +33,25 @@ def get_resource_path(filename: str) -> str:
     return str(resource_path)
 
 
-def get_tessdata_dir() -> str:
+def get_tessdata_dir() -> pathlib.Path:
     if getattr(sys, "dangerzone_dev", False) or platform.system() in (
         "Windows",
         "Darwin",
     ):
         # Always use the tessdata path from the Dangerzone ./share directory, for
         # development builds, or in Windows/macOS platforms.
-        return get_resource_path("tessdata")
+        return pathlib.Path(get_resource_path("tessdata"))
 
-    fedora_tessdata_dir = "/usr/share/tesseract/tessdata/"
-    debian_tessdata_dir = "/usr/share/tessdata/"
-    if os.path.isdir(fedora_tessdata_dir):
-        return fedora_tessdata_dir
-    if os.path.isdir(debian_tessdata_dir):
-        return debian_tessdata_dir
-    else:
-        raise RuntimeError("Tesseract language data are not installed in the system")
+    tessdata_dirs = [
+        pathlib.Path("/usr/share/tessdata/"),  # on debian
+        pathlib.Path("/usr/share/tesseract/tessdata/"),  # on fedora
+    ]
+
+    for dir in tessdata_dirs:
+        if dir.is_dir():
+            return dir
+
+    raise RuntimeError("Tesseract language data are not installed in the system")
 
 
 def get_version() -> str:
diff --git a/tests/test_ocr.py b/tests/test_ocr.py
index 1335df4..2b8836f 100644
--- a/tests/test_ocr.py
+++ b/tests/test_ocr.py
@@ -1,10 +1,3 @@
-import pathlib
-import platform
-import subprocess
-from pathlib import Path
-
-import pytest
-
 from dangerzone.isolation_provider.dummy import Dummy
 from dangerzone.logic import DangerzoneCore
 from dangerzone.util import get_tessdata_dir
@@ -12,9 +5,8 @@ from dangerzone.util import get_tessdata_dir
 
 def test_ocr_ommisions() -> None:
     # Grab the languages that are available in the Tesseract data dir.
-    tessdata_dir = pathlib.Path(get_tessdata_dir())
     suffix_len = len(".traineddata")
-    available_langs = {f.name[:-suffix_len] for f in tessdata_dir.iterdir()}
+    available_langs = {f.name[:-suffix_len] for f in get_tessdata_dir().iterdir()}
 
     # Grab the languages that Dangerzone offers to the user through the GUI/CLI.
     offered_langs = set(DangerzoneCore(Dummy()).ocr_languages.values())