diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba0e21e..53915fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+0.9.0 (2022-05-26)
+------------------
+
+ - allow file:// mirrors
+ - /var/cache/apt/archives/ is now allowed to contain packages
+ - add file-mirror-automount hook-dir
+ - set $MMDEBSTRAP_VERBOSITY in hooks
+ - rewrite coverage with multiple individual and skippable shell scripts
+
 0.8.6 (2022-03-25)
 ------------------
 
diff --git a/coverage.py b/coverage.py
index 97b50b1..b219bcb 100755
--- a/coverage.py
+++ b/coverage.py
@@ -5,6 +5,7 @@ import os
 import sys
 import shutil
 import subprocess
+import argparse
 
 have_qemu = os.getenv("HAVE_QEMU", "yes") == "yes"
 have_unshare = os.getenv("HAVE_UNSHARE", "yes") == "yes"
@@ -16,14 +17,24 @@ all_dists = ["oldstable", "stable", "testing", "unstable"]
 default_mode = "unshare" if have_unshare else "root"
 all_modes = ["auto", "root", "unshare", "fakechroot", "chrootless"]
 default_variant = "apt"
-all_variants = ["extract", "custom", "essential", "apt", "minbase", "buildd", "-", "standard"]
+all_variants = [
+    "extract",
+    "custom",
+    "essential",
+    "apt",
+    "minbase",
+    "buildd",
+    "-",
+    "standard",
+]
 default_format = "auto"
 all_formats = ["auto", "directory", "tar", "squashfs", "ext2", "null"]
 
 only_dists = []
 
-mirror=os.getenv("mirror", "http://127.0.0.1/debian")
-hostarch=subprocess.check_output(["dpkg", "--print-architecture"]).decode().strip()
+mirror = os.getenv("mirror", "http://127.0.0.1/debian")
+hostarch = subprocess.check_output(["dpkg", "--print-architecture"]).decode().strip()
+
 
 def skip(condition, dist, mode, variant, fmt):
     if not condition:
@@ -37,7 +48,29 @@ def skip(condition, dist, mode, variant, fmt):
             break
     return toskip
 
+
 def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("test", nargs="*", help="only run these tests")
+    parser.add_argument(
+        "-x",
+        "--exitfirst",
+        action="store_const",
+        dest="maxfail",
+        const=1,
+        help="exit instantly on first error or failed test.",
+    )
+    parser.add_argument(
+        "--maxfail",
+        metavar="num",
+        action="store",
+        type=int,
+        dest="maxfail",
+        default=0,
+        help="exit after first num failures or errors.",
+    )
+    args = parser.parse_args()
+
     onlyrun = None
     if len(sys.argv) > 1:
         onlyrun = sys.argv[1]
@@ -46,7 +79,7 @@ def main():
     with open("coverage.txt") as f:
         for test in Deb822.iter_paragraphs(f):
             name = test["Test"]
-            if onlyrun and name != onlyrun:
+            if args.test and name not in args.text:
                 continue
             tt = None
             if have_qemu:
@@ -100,17 +133,21 @@ def main():
     skipped = []
     failed = []
     for i, (test, name, dist, mode, variant, fmt) in enumerate(tests):
-        print("------------------------------------------------------------------------------")
-        print("(%d/%d) %s"%(i+1,len(tests),name))
-        print("dist: %s"%dist)
-        print("mode: %s"%mode)
-        print("variant: %s"%variant)
-        print("format: %s"%fmt)
-        print("------------------------------------------------------------------------------")
-        with open("tests/"+name) as fin, open("shared/test.sh", "w") as fout:
+        print(
+            "------------------------------------------------------------------------------"
+        )
+        print("(%d/%d) %s" % (i + 1, len(tests), name))
+        print("dist: %s" % dist)
+        print("mode: %s" % mode)
+        print("variant: %s" % variant)
+        print("format: %s" % fmt)
+        print(
+            "------------------------------------------------------------------------------"
+        )
+        with open("tests/" + name) as fin, open("shared/test.sh", "w") as fout:
             for line in fin:
                 for e in ["CMD", "SOURCE_DATE_EPOCH"]:
-                    line = line.replace("{{ "+e+" }}", os.getenv(e))
+                    line = line.replace("{{ " + e + " }}", os.getenv(e))
                 line = line.replace("{{ DIST }}", dist)
                 line = line.replace("{{ MIRROR }}", mirror)
                 line = line.replace("{{ MODE }}", mode)
@@ -129,13 +166,16 @@ def main():
             case "skip":
                 skipped.append((name, dist, mode, variant, fmt))
                 continue
-        success = True
+        proc = subprocess.Popen(argv)
         try:
-            subprocess.check_call(argv)
-        except:
-            success = False
-        if not success:
+            proc.wait()
+        except KeyboardInterrupt:
+            proc.kill()
+            break
+        if proc.returncode != 0:
             failed.append((name, dist, mode, variant, fmt))
+        if args.maxfail and len(failed) >= args.maxfail:
+            break
     if skipped:
         print("skipped:")
         for t in skipped:
@@ -146,5 +186,6 @@ def main():
             print(t)
         exit(1)
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     main()
diff --git a/mmdebstrap b/mmdebstrap
index 21939a0..2c5b6e3 100755
--- a/mmdebstrap
+++ b/mmdebstrap
@@ -23,7 +23,7 @@
 use strict;
 use warnings;
 
-our $VERSION = '0.8.6';
+our $VERSION = '0.9.0';
 
 use English;
 use Getopt::Long;