diff --git a/pkgs/test/nixpkgs-check-by-name/src/nixpkgs_problem.rs b/pkgs/test/nixpkgs-check-by-name/src/nixpkgs_problem.rs
index cf40238f9cb6..762d0e9fb0e0 100644
--- a/pkgs/test/nixpkgs-check-by-name/src/nixpkgs_problem.rs
+++ b/pkgs/test/nixpkgs-check-by-name/src/nixpkgs_problem.rs
@@ -204,7 +204,8 @@ impl fmt::Display for NixpkgsProblem {
                       Notably the second argument must not be empty, which is not the case.
                       It is defined in {}:{} as
 
-                    {}",
+                    {}
+                    ",
                     structure::relative_dir_for_package(package_name).display(),
                     structure::relative_file_for_package(package_name).display(),
                     file.display(),
@@ -222,7 +223,8 @@ impl fmt::Display for NixpkgsProblem {
                       This is however not the case: A different `callPackage` is used.
                       It is defined in {}:{} as
 
-                    {}",
+                    {}
+                    ",
                     structure::relative_dir_for_package(package_name).display(),
                     structure::relative_file_for_package(package_name).display(),
                     file.display(),
@@ -240,7 +242,8 @@ impl fmt::Display for NixpkgsProblem {
                       This is however not the case: The first callPackage argument is not right:
                       It is defined in {}:{} as
 
-                    {}",
+                    {}
+                    ",
                     structure::relative_dir_for_package(package_name).display(),
                     structure::relative_file_for_package(package_name).display(),
                     file.display(),
@@ -258,7 +261,8 @@ impl fmt::Display for NixpkgsProblem {
                       This is however not the case: The first `callPackage` argument is the wrong path.
                       It is defined in {}:{}:{} as
 
-                        {package_name} = callPackage {} {{ /* ... */ }};",
+                        {package_name} = callPackage {} {{ /* ... */ }};
+                    ",
                     structure::relative_dir_for_package(package_name).display(),
                     create_path_expr(file, expected_path),
                     file.display(), line, column,
@@ -275,7 +279,8 @@ impl fmt::Display for NixpkgsProblem {
                       This is however not the case.
                       It is defined in {}:{} as
 
-                    {}",
+                    {}
+                    ",
                     structure::relative_dir_for_package(package_name).display(),
                     structure::relative_file_for_package(package_name).display(),
                     file.display(),
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/alt-callPackage/expected b/pkgs/test/nixpkgs-check-by-name/tests/alt-callPackage/expected
index 80d79ecaba12..2d05db0d4699 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/alt-callPackage/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/alt-callPackage/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:5 as
 
     foo = self.alt.callPackage ({ }: self.someDrv) { };
+
 This PR introduces the above problems, merging would break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/manual-definition/expected b/pkgs/test/nixpkgs-check-by-name/tests/manual-definition/expected
index e619887012d0..71d78019604b 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/manual-definition/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/manual-definition/expected
@@ -6,6 +6,7 @@
   It is defined in all-packages.nix:9 as
 
     noEval = self.callPackage ./pkgs/by-name/no/noEval/package.nix { };
+
 - Because pkgs/by-name/on/onlyMove exists, the attribute `pkgs.onlyMove` must be defined like
 
     onlyMove = callPackage ./pkgs/by-name/on/onlyMove/package.nix { /* ... */ };
@@ -14,4 +15,5 @@
   It is defined in all-packages.nix:7 as
 
     onlyMove = self.callPackage ./pkgs/by-name/on/onlyMove/package.nix { };
+
 This PR introduces the above problems compared to the base branch, merging is discouraged, but would not break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/non-syntactical-callPackage-by-name/expected b/pkgs/test/nixpkgs-check-by-name/tests/non-syntactical-callPackage-by-name/expected
index 5f914d1fce96..f56585ac4678 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/non-syntactical-callPackage-by-name/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/non-syntactical-callPackage-by-name/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:4 as
 
     foo = self.bar;
+
 This PR introduces the above problems, merging would break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/override-different-file/expected b/pkgs/test/nixpkgs-check-by-name/tests/override-different-file/expected
index 6f439dd4b7d0..571ec8e09a5c 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/override-different-file/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/override-different-file/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:2:3 as
 
     nonDerivation = callPackage ./someDrv.nix { /* ... */ };
+
 This PR introduces the above problems, merging would break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/override-empty-arg/expected b/pkgs/test/nixpkgs-check-by-name/tests/override-empty-arg/expected
index dc64698f4bfa..257030e9a6c0 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/override-empty-arg/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/override-empty-arg/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:2 as
 
     nonDerivation = self.callPackage ./pkgs/by-name/no/nonDerivation/package.nix { };
+
 This PR introduces the above problems compared to the base branch, merging is discouraged, but would not break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/override-no-call-package/expected b/pkgs/test/nixpkgs-check-by-name/tests/override-no-call-package/expected
index f1fc4892b2ab..eb13c4df1e88 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/override-no-call-package/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/override-no-call-package/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:2 as
 
     nonDerivation = self.someDrv;
+
 This PR introduces the above problems, merging would break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/override-no-file/expected b/pkgs/test/nixpkgs-check-by-name/tests/override-no-file/expected
index 040d7c635f7a..31679e55b7d6 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/override-no-file/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/override-no-file/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:2 as
 
     nonDerivation = self.callPackage ({ someDrv }: someDrv) { };
+
 This PR introduces the above problems, merging would break the base branch
diff --git a/pkgs/test/nixpkgs-check-by-name/tests/override-non-path/expected b/pkgs/test/nixpkgs-check-by-name/tests/override-non-path/expected
index 1f15c6473b4a..e7fd8242f5f4 100644
--- a/pkgs/test/nixpkgs-check-by-name/tests/override-non-path/expected
+++ b/pkgs/test/nixpkgs-check-by-name/tests/override-non-path/expected
@@ -6,4 +6,5 @@
   It is defined in all-packages.nix:3 as
 
     foo = self.callPackage ({ someDrv, someFlag }: someDrv) { someFlag = true; };
+
 This PR introduces the above problems, merging would break the base branch