diff --git a/tests/unit/libexpr/package.nix b/tests/unit/libexpr/package.nix
index 6b7e12c4a..5f52170ba 100644
--- a/tests/unit/libexpr/package.nix
+++ b/tests/unit/libexpr/package.nix
@@ -41,8 +41,6 @@ mkMesonDerivation (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  outputs = [ "out" "dev" ];
-
   nativeBuildInputs = [
     meson
     ninja
diff --git a/tests/unit/libfetchers/package.nix b/tests/unit/libfetchers/package.nix
index 9522f9639..88ccaca7f 100644
--- a/tests/unit/libfetchers/package.nix
+++ b/tests/unit/libfetchers/package.nix
@@ -40,8 +40,6 @@ mkMesonDerivation (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  outputs = [ "out" "dev" ];
-
   nativeBuildInputs = [
     meson
     ninja
diff --git a/tests/unit/libflake/package.nix b/tests/unit/libflake/package.nix
index 859bc49d0..3c99efbba 100644
--- a/tests/unit/libflake/package.nix
+++ b/tests/unit/libflake/package.nix
@@ -40,8 +40,6 @@ mkMesonDerivation (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  outputs = [ "out" "dev" ];
-
   nativeBuildInputs = [
     meson
     ninja
diff --git a/tests/unit/libstore/package.nix b/tests/unit/libstore/package.nix
index efffd0063..e68cc3a62 100644
--- a/tests/unit/libstore/package.nix
+++ b/tests/unit/libstore/package.nix
@@ -42,8 +42,6 @@ mkMesonDerivation (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  outputs = [ "out" "dev" ];
-
   nativeBuildInputs = [
     meson
     ninja
diff --git a/tests/unit/libutil/package.nix b/tests/unit/libutil/package.nix
index ad5ff7d1e..b635aa811 100644
--- a/tests/unit/libutil/package.nix
+++ b/tests/unit/libutil/package.nix
@@ -40,8 +40,6 @@ mkMesonDerivation (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  outputs = [ "out" "dev" ];
-
   nativeBuildInputs = [
     meson
     ninja