Index: subversion/tests/cmdline/svnadmin_tests.py
===================================================================
--- subversion/tests/cmdline/svnadmin_tests.py	(revision 1868481)
+++ subversion/tests/cmdline/svnadmin_tests.py	(working copy)
@@ -3859,7 +3859,7 @@
                                      sbox.repo_url)
 
   dump_lines = svntest.actions.run_and_verify_dump(sbox.repo_dir)
-  assert propval + '\n' in dump_lines
+  assert propval.encode() + b'\n' in dump_lines
 
 def check_recover_prunes_rep_cache(sbox, enable_rep_sharing):
   """Check 'recover' prunes the rep-cache while enable-rep-sharing is
Index: subversion/tests/cmdline/tree_conflict_tests.py
===================================================================
--- subversion/tests/cmdline/tree_conflict_tests.py	(revision 1868481)
+++ subversion/tests/cmdline/tree_conflict_tests.py	(working copy)
@@ -1518,7 +1518,7 @@
   sbox.simple_move('A/B', 'A/B2')
   sbox.simple_commit()
   sbox.simple_update()
-  main.file_append_binary(sbox.ospath("A/B2/lambda"), "This is more content.\n")
+  main.file_append(sbox.ospath("A/B2/lambda"), "This is more content.\n")
   sbox.simple_commit()
   sbox.simple_update()
 
@@ -1541,7 +1541,7 @@
   # If everything works as expected the resolver will recommended a
   # resolution option and 'svn' will resolve the conflict automatically.
   # Verify that 'A1/B/lambda' contains the merged content:
-  contents = open(sbox.ospath('A1/B/lambda'), 'rb').readlines()
+  contents = open(sbox.ospath('A1/B/lambda'), 'r').readlines()
   svntest.verify.compare_and_display_lines(
     "A1/B/lambda has unexpectected contents", sbox.ospath("A1/B/lambda"),
     [ "This is the file 'lambda'.\n", "This is more content.\n"], contents)