diff --git a/tests/file-src-deps-level2/default.nix b/tests/file-src-deps-level2/default.nix
index 9a73a07ad..e4b51f6f0 100644
--- a/tests/file-src-deps-level2/default.nix
+++ b/tests/file-src-deps-level2/default.nix
@@ -6,4 +6,9 @@ poetry2nix.mkPoetryApplication {
   poetrylock = ./poetry.lock;
   src = lib.cleanSource ./.;
   pwd = ./.;
+  overrides = poetry2nix.overrides.withDefaults (self: super: {
+    trivial = super.trivial.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs or [ ] ++ [ self.poetry ];
+    });
+  });
 }
diff --git a/tests/file-src-deps/default.nix b/tests/file-src-deps/default.nix
index 9a73a07ad..e4b51f6f0 100644
--- a/tests/file-src-deps/default.nix
+++ b/tests/file-src-deps/default.nix
@@ -6,4 +6,9 @@ poetry2nix.mkPoetryApplication {
   poetrylock = ./poetry.lock;
   src = lib.cleanSource ./.;
   pwd = ./.;
+  overrides = poetry2nix.overrides.withDefaults (self: super: {
+    trivial = super.trivial.overridePythonAttrs (old: {
+      buildInputs = old.buildInputs or [ ] ++ [ self.poetry ];
+    });
+  });
 }