diff --git a/playa/pdfdocument.py b/playa/pdfdocument.py
index 71ac532e..9e0f4027 100644
--- a/playa/pdfdocument.py
+++ b/playa/pdfdocument.py
@@ -29,7 +29,6 @@
 
 from playa import settings
 from playa.arcfour import Arcfour
-from playa.cmapdb import CMap, CMapBase, CMapDB
 from playa.data_structures import NameTree, NumberTree
 from playa.exceptions import (
     PDFEncryptionError,
diff --git a/playa/pdfpage.py b/playa/pdfpage.py
index 68d7c23d..f9b2e4e0 100644
--- a/playa/pdfpage.py
+++ b/playa/pdfpage.py
@@ -771,7 +771,7 @@ def get_colorspace(spec: object) -> Optional[PDFColorSpace]:
                         self.csmap[csid] = colorspace
             elif k == "ProcSet":
                 pass  # called get_procset which did exactly
-                      # nothing. perhaps we want to do something?
+                # nothing. perhaps we want to do something?
             elif k == "XObject":
                 for xobjid, xobjstrm in dict_value(v).items():
                     self.xobjmap[xobjid] = xobjstrm
diff --git a/tests/benchmark_convert.py b/tests/benchmark_convert.py
index 9924e675..7a4471d2 100644
--- a/tests/benchmark_convert.py
+++ b/tests/benchmark_convert.py
@@ -60,7 +60,7 @@ def benchmark_one_pdfminer(path: Path):
     # Silence warnings about broken PDFs
     logging.basicConfig(level=logging.ERROR)
     niter = 10
-    miner_time = beach_time = 0.
+    miner_time = beach_time = 0.0
     for iter in range(niter + 1):
         for path in ALLPDFS:
             if len(sys.argv) == 1 or "playa" in sys.argv[1:]: