diff --git a/src/Text/Pretty/Simple.hs b/src/Text/Pretty/Simple.hs
index c6a21b0..13a7cf9 100644
--- a/src/Text/Pretty/Simple.hs
+++ b/src/Text/Pretty/Simple.hs
@@ -680,6 +680,15 @@ layoutStringAnsi opts = fmap convertStyle . layoutString opts
 --         , B
 --             ( B ( B A ) ) ] )
 --
+-- >>> pPrintOpt CheckColorTty defaultOutputOptionsDarkBg {outputOptionsCompact = True} $ [("id", 123), ("state", 1), ("pass", 1), ("tested", 100), ("time", 12345)]
+-- [
+--     ( "id", 123 ),
+--     ( "state", 1 ),
+--     ( "pass", 1 ),
+--     ( "tested", 100 ),
+--     ( "time", 12345 )
+-- ]
+--
 -- __Initial indent__
 --
 -- >>> pPrintOpt CheckColorTty defaultOutputOptionsDarkBg {outputOptionsInitialIndent = 3} $ B ( B ( B ( B A ) ) )
diff --git a/src/Text/Pretty/Simple/Internal/Printer.hs b/src/Text/Pretty/Simple/Internal/Printer.hs
index 14c64ae..8185989 100644
--- a/src/Text/Pretty/Simple/Internal/Printer.hs
+++ b/src/Text/Pretty/Simple/Internal/Printer.hs
@@ -255,7 +255,8 @@ prettyExpr opts = (if outputOptionsCompact opts then group else id) . \case
             spaceIfNeeded = \case
               Other (' ' : _) : _ -> mempty
               _ -> space
-    lineAndCommaSep x y = x <> line' <> annotate Comma "," <> y
+    lineAndCommaSep x y = x <> munless (outputOptionsCompact opts) line' <> annotate Comma "," <> y
+    munless b x = if b then mempty else x
 
 -- | Determine whether this expression should be displayed on a single line.
 isSimple :: Expr -> Bool
diff --git a/stack.yaml b/stack.yaml
index 40321c8..f372e8a 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,7 +1,7 @@
 # For more information, see: http://docs.haskellstack.org/en/stable/yaml_configuration.html
 
 # Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-18.02
+resolver: lts-18.28
 
 # Local packages, usually specified by relative directory name
 packages: