diff --git a/tests/conftest.py b/tests/conftest.py
index 19191b6c..19679fdf 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -72,6 +72,17 @@ def needs_pdfminer(fn):
     return fn
 
 
+@pytest.helpers.register
+def have_unpaper():
+    try:
+        from ocrmypdf.exec import unpaper
+
+        unpaper.version()
+    except Exception:
+        return False
+    return True
+
+
 TESTS_ROOT = os.path.abspath(os.path.dirname(__file__))
 SPOOF_PATH = os.path.join(TESTS_ROOT, 'spoof')
 PROJECT_ROOT = os.path.dirname(TESTS_ROOT)
diff --git a/tests/test_main.py b/tests/test_main.py
index a34968d2..18a4ff27 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -28,7 +28,7 @@ import pytest
 from PIL import Image
 
 from ocrmypdf.exceptions import ExitCode, MissingDependencyError
-from ocrmypdf.exec import ghostscript, qpdf, tesseract
+from ocrmypdf.exec import ghostscript, qpdf, tesseract, unpaper
 from ocrmypdf.leptonica import Pix
 from ocrmypdf.pdfa import file_claims_pdfa
 from ocrmypdf.pdfinfo import Colorspace, Encoding, PdfInfo
@@ -164,7 +164,7 @@ def test_exotic_image(
     check_ocrmypdf(
         resources / pdf,
         outfile,
-        '-dc',
+        '-dc' if pytest.helpers.have_unpaper() else '-d',
         '-v',
         '1',
         '--output-type',
@@ -282,8 +282,7 @@ def test_maximum_options(
         resources / 'multipage.pdf',
         outpdf,
         '-d',
-        '-c',
-        '-i',
+        '-ci' if pytest.helpers.have_unpaper() else None,
         '-f',
         '-k',
         '--oversample',
@@ -542,7 +541,6 @@ def test_jbig2_passthrough(spoof_tesseract_cache, resources, outpdf):
         'hocr',
         env=spoof_tesseract_cache,
     )
-
     out_pageinfo = PdfInfo(out)
     assert out_pageinfo[0].images[0].enc == Encoding.jbig2
 
@@ -777,10 +775,10 @@ def test_pagesize_consistency(renderer, resources, outpdf):
         outpdf,
         '--pdf-renderer',
         renderer,
-        '--clean',
+        '--clean' if pytest.helpers.have_unpaper() else None,
         '--deskew',
         '--remove-background',
-        '--clean-final',
+        '--clean-final' if pytest.helpers.have_unpaper() else None,
     )
 
     after_dims = first_page_dimensions(outpdf)
diff --git a/tests/test_tess4.py b/tests/test_tess4.py
index 7720d16b..06e1ab28 100644
--- a/tests/test_tess4.py
+++ b/tests/test_tess4.py
@@ -117,7 +117,7 @@ def test_pagesize_consistency_tess4(ensure_tess4, resources, outpdf):
         outpdf,
         '--pdf-renderer',
         'sandwich',
-        '--clean',
+        '--clean' if pytest.helpers.have_unpaper() else None,
         '--deskew',
         '--remove-background',
         '--clean-final',
diff --git a/tests/test_userunit.py b/tests/test_userunit.py
index 3f220146..3584d8b9 100644
--- a/tests/test_userunit.py
+++ b/tests/test_userunit.py
@@ -15,20 +15,11 @@
 # You should have received a copy of the GNU General Public License
 # along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
 
-import logging
-import os
-import shutil
 from math import isclose
-from subprocess import DEVNULL, PIPE, Popen, check_call, check_output
 
-import PyPDF2 as pypdf
 import pytest
 
-from ocrmypdf import leptonica
 from ocrmypdf.exceptions import ExitCode
-from ocrmypdf.exec import ghostscript
-from ocrmypdf.pdfa import file_claims_pdfa
-from ocrmypdf.pdfinfo import Colorspace, Encoding, PdfInfo
 
 check_ocrmypdf = pytest.helpers.check_ocrmypdf
 run_ocrmypdf = pytest.helpers.run_ocrmypdf