diff --git a/src/script/hydra-eval-jobset b/src/script/hydra-eval-jobset
index 99277fd4..8bafe07c 100755
--- a/src/script/hydra-eval-jobset
+++ b/src/script/hydra-eval-jobset
@@ -801,7 +801,7 @@ sub checkJobsetWrapped {
                 next unless $job->{constituents};
 
                 if (defined $job->{error}) {
-                    die "aggregate job ‘$job->{jobName}’ failed with the error: $job->{error}";
+                    die "aggregate job ‘$job->{jobName}’ failed with the error: $job->{error}\n";
                 }
 
                 my $x = $drvPathToId{$job->{drvPath}} or
diff --git a/t/lib/HydraTestContext.pm b/t/lib/HydraTestContext.pm
index ce05b581..237fcbe4 100644
--- a/t/lib/HydraTestContext.pm
+++ b/t/lib/HydraTestContext.pm
@@ -145,7 +145,7 @@ sub nix_state_dir {
 sub makeAndEvaluateJobset {
     my ($self, %opts) = @_;
 
-    my $expression = $opts{'expression'} || die "Mandatory 'expression' option not passed to makeAndEvaluateJobset.";
+    my $expression = $opts{'expression'} || die "Mandatory 'expression' option not passed to makeAndEvaluateJobset.\n";
     my $jobsdir = $opts{'jobsdir'} // $self->jobsdir;
     my $should_build = $opts{'build'} // 0;
 
@@ -155,13 +155,13 @@ sub makeAndEvaluateJobset {
     );
     my $jobset = $jobsetCtx->{"jobset"};
 
-    evalSucceeds($jobset) or die "Evaluating jobs/$expression should exit with return code 0";
+    evalSucceeds($jobset) or die "Evaluating jobs/$expression should exit with return code 0.\n";
 
     my $builds = {};
 
     for my $build ($jobset->builds) {
         if ($should_build) {
-            runBuild($build) or die "Build '".$build->job."' from jobs/$expression should exit with return code 0";
+            runBuild($build) or die "Build '".$build->job."' from jobs/$expression should exit with return code 0.\n";
             $build->discard_changes();
         }
 
@@ -184,7 +184,7 @@ sub makeAndEvaluateJobset {
 sub makeJobset {
     my ($self, %opts) = @_;
 
-    my $expression = $opts{'expression'} || die "Mandatory 'expression' option not passed to makeJobset.";
+    my $expression = $opts{'expression'} || die "Mandatory 'expression' option not passed to makeJobset.\n";
     my $jobsdir = $opts{'jobsdir'} // $self->jobsdir;
 
     # Create a new user for this test
@@ -227,7 +227,7 @@ sub DESTROY
 
 sub write_file {
     my ($path, $text) = @_;
-    open(my $fh, '>', $path) or die "Could not open file '$path' $!";
+    open(my $fh, '>', $path) or die "Could not open file '$path' $!\n.";
     print $fh $text || "";
     close $fh;
 }