diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,3 +1,8 @@
+pandoc-citeproc (0.10.5.1)
+
+  * Minor tweaks for clean CI builds.
+  * Require recent yaml for uniform test output.
+
 pandoc-citeproc (0.10.5)
 
   * Use file-embed instead of hsb2hs for embed_data_files flag (#285).
diff --git a/pandoc-citeproc.cabal b/pandoc-citeproc.cabal
--- a/pandoc-citeproc.cabal
+++ b/pandoc-citeproc.cabal
@@ -1,5 +1,5 @@
 name:               pandoc-citeproc
-version:            0.10.5
+version:            0.10.5.1
 cabal-version:      >= 1.12
 synopsis:           Supports using pandoc with citeproc
 
@@ -128,9 +128,6 @@
        build-depends: file-embed >= 0.0 && < 0.1
        cpp-options:   -DEMBED_DATA_FILES
        other-modules: Text.CSL.Data.Embedded
-       if os(darwin)
-          Build-Tools:   cpphs >= 1.19
-          ghc-options:   -pgmP cpphs -optP --cpp
 
     if flag(unicode_collation)
        build-depends: text, text-icu
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -14,4 +14,4 @@
 extra-deps:
 - xml-conduit-1.5.0
 - skylighting-0.3.3
-resolver: lts-8.12
+resolver: lts-8.16
diff --git a/tests/biblio2yaml/knuth-ct-e.biblatex b/tests/biblio2yaml/knuth-ct-e.biblatex
--- a/tests/biblio2yaml/knuth-ct-e.biblatex
+++ b/tests/biblio2yaml/knuth-ct-e.biblatex
@@ -53,7 +53,7 @@
   volume-title: Computer modern typefaces
   publisher: Addison-Wesley
   publisher-place: Reading, Mass.
-  volume: 'E'
+  volume: E
   annote: The fifth volume of a five-volume book. Note the sorttitle and sortyear
     fields
   language: en-US
diff --git a/tests/test-citeproc.hs b/tests/test-citeproc.hs
--- a/tests/test-citeproc.hs
+++ b/tests/test-citeproc.hs
@@ -11,7 +11,6 @@
 import System.Environment (getArgs)
 import System.Process
 import System.IO.Temp (withSystemTempDirectory)
-import Text.Pandoc.Definition (Inline(Span, Str))
 import qualified Text.Pandoc.UTF8 as UTF8
 import Data.Aeson
 import System.FilePath
diff --git a/tests/test-pandoc-citeproc.hs b/tests/test-pandoc-citeproc.hs
--- a/tests/test-pandoc-citeproc.hs
+++ b/tests/test-pandoc-citeproc.hs
@@ -4,10 +4,8 @@
 import System.Exit
 import System.Directory
 import System.FilePath
-import qualified Control.Exception as E
 import Data.Maybe (fromMaybe)
 import System.IO
-import Data.Monoid (mempty)
 import System.IO.Temp (withSystemTempDirectory)
 import System.Process (rawSystem)
 import qualified Data.Aeson as Aeson
@@ -17,6 +15,9 @@
 import Data.List (isSuffixOf)
 import System.Environment
 import Control.Monad (when)
+#if MIN_VERSION_pandoc(2,0,0)
+import qualified Control.Exception as E
+#endif
 
 main :: IO ()
 main = do