diff --git a/.gitignore b/.gitignore
index e3e5e72..d42744f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,5 @@ deps
 erln8.config
 hexer.config
 TEST-*.xml
+*.d
+_build
diff --git a/rebar.config b/rebar.config
index 9d26448..0206198 100644
--- a/rebar.config
+++ b/rebar.config
@@ -40,6 +40,14 @@
 ]}.
 
 {plugins, [
-    rebar_gdb_plugin
+    rebar_gdb_plugin, pc
 ]}.
 
+{provider_hooks,
+ [
+  {pre,
+   [
+    {compile, {pc, compile}},
+    {clean, {pc, clean}}
+   ]}
+]}.
diff --git a/test/jiffy_01_yajl_tests.erl b/test/jiffy_01_yajl_tests.erl
index aedaf71..8c1ec97 100644
--- a/test/jiffy_01_yajl_tests.erl
+++ b/test/jiffy_01_yajl_tests.erl
@@ -5,6 +5,7 @@
 
 
 -include_lib("eunit/include/eunit.hrl").
+-include("jiffy_util.hrl").
 
 
 yajl_test_() ->
@@ -19,7 +20,7 @@ gen({Name, Json, Erl}) ->
 
 
 read_cases() ->
-    CasesPath = filename:join(["..", "test", "cases", "*.json"]),
+    CasesPath = filename:join([cases_path(), "*.json"]),
     FileNames = lists:sort(filelib:wildcard(CasesPath)),
     lists:map(fun(F) -> make_pair(F) end, FileNames).
 
@@ -30,3 +31,4 @@ make_pair(FileName) ->
     ErlFname = BaseName ++ ".eterm",
     {ok, [Term]} = file:consult(ErlFname),
     {filename:basename(BaseName), Json, Term}.
+
diff --git a/test/jiffy_10_short_double_tests.erl b/test/jiffy_10_short_double_tests.erl
index d66e1ea..b709441 100644
--- a/test/jiffy_10_short_double_tests.erl
+++ b/test/jiffy_10_short_double_tests.erl
@@ -8,7 +8,8 @@
 -include("jiffy_util.hrl").
 
 
-filename() -> "../test/cases/short-doubles.txt".
+filename() ->
+    cases_path() ++ "/short-doubles.txt".
 
 
 short_double_test_() ->
diff --git a/test/jiffy_util.hrl b/test/jiffy_util.hrl
index 51bd86a..8b95415 100644
--- a/test/jiffy_util.hrl
+++ b/test/jiffy_util.hrl
@@ -25,3 +25,15 @@ enc(V) ->
 
 enc(V, Opts) ->
     iolist_to_binary(jiffy:encode(V, Opts)).
+
+%% rebar runs eunit with PWD as .eunit/
+%% rebar3 runs eunit with PWD as ./
+%% this adapts to the differences
+cases_path() ->
+    Path = "test/cases",
+    AltPath = "../" ++ Path,
+    case filelib:is_dir( Path ) of
+        true -> Path;
+        false -> AltPath
+    end.
+