diff --git a/src_test/api/dune b/src_test/api/dune
index b5e850c..5b9ff4f 100644
--- a/src_test/api/dune
+++ b/src_test/api/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_api)
- (libraries oUnit compiler-libs.common ppx_deriving.api)
+ (libraries ounit2 compiler-libs.common ppx_deriving.api)
  (preprocess (action (run ppxfind -legacy ppx_tools.metaquot --as-pp %{input-file}))))
diff --git a/src_test/create/dune b/src_test/create/dune
index 24e8835..d06eb40 100644
--- a/src_test/create/dune
+++ b/src_test/create/dune
@@ -1,4 +1,4 @@
 (test
  (name test_deriving_create)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.create ppx_deriving.show)))
diff --git a/src_test/deriving/dune b/src_test/deriving/dune
index f7f91be..1f30239 100644
--- a/src_test/deriving/dune
+++ b/src_test/deriving/dune
@@ -1,4 +1,4 @@
 (test
  (name test_ppx_deriving)
- (libraries oUnit compiler-libs.common ppx_deriving.api)
+ (libraries ounit2 compiler-libs.common ppx_deriving.api)
  (preprocess (pps ppx_deriving.ord ppx_deriving.show ppx_deriving.eq)))
diff --git a/src_test/enum/dune b/src_test/enum/dune
index 3aba723..71f4a33 100644
--- a/src_test/enum/dune
+++ b/src_test/enum/dune
@@ -1,4 +1,4 @@
 (test
  (name test_deriving_enum)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.enum ppx_deriving.show)))
diff --git a/src_test/eq/dune b/src_test/eq/dune
index 69c0111..83710f5 100644
--- a/src_test/eq/dune
+++ b/src_test/eq/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_deriving_eq)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.eq ppx_deriving.show)))
diff --git a/src_test/fold/dune b/src_test/fold/dune
index 35ba2c3..245115b 100644
--- a/src_test/fold/dune
+++ b/src_test/fold/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_deriving_fold)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.fold)))
diff --git a/src_test/iter/dune b/src_test/iter/dune
index 6f21485..48f3a7a 100644
--- a/src_test/iter/dune
+++ b/src_test/iter/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_deriving_iter)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.iter ppx_deriving.show)))
diff --git a/src_test/make/dune b/src_test/make/dune
index 7f5b8f4..6778c79 100644
--- a/src_test/make/dune
+++ b/src_test/make/dune
@@ -1,4 +1,4 @@
 (test
  (name test_deriving_make)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.make ppx_deriving.show)))
diff --git a/src_test/map/dune b/src_test/map/dune
index 0f98e7a..5d2501a 100644
--- a/src_test/map/dune
+++ b/src_test/map/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_deriving_map)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.map ppx_deriving.show)))
diff --git a/src_test/ord/dune b/src_test/ord/dune
index 178df2c..0acf052 100644
--- a/src_test/ord/dune
+++ b/src_test/ord/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_deriving_ord)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.ord)))
diff --git a/src_test/runtime/dune b/src_test/runtime/dune
index 3b30e8b..249fd8c 100644
--- a/src_test/runtime/dune
+++ b/src_test/runtime/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_runtime)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.eq ppx_deriving.show)))
diff --git a/src_test/show/dune b/src_test/show/dune
index 0e95c5f..1f35eea 100644
--- a/src_test/show/dune
+++ b/src_test/show/dune
@@ -5,5 +5,5 @@
 
 (test
  (name test_deriving_show)
- (libraries oUnit ppx_deriving.runtime)
+ (libraries ounit2 ppx_deriving.runtime)
  (preprocess (pps ppx_deriving.show)))