diff --git a/scripts/Util.pm b/scripts/Util.pm
index f982ae3..495083c 100644
--- a/scripts/Util.pm
+++ b/scripts/Util.pm
@@ -15,6 +15,8 @@ sub notify {
 
     system( 'curl', '-H', "Authorization: Bearer $ntfy_token",
         '-d', $msg, "$ntfy_url/$ntfy_topic" );
+
+    sleep(1);
 }
 
 sub notify_file {
@@ -25,6 +27,40 @@ sub notify_file {
         '-T',   $file, '-H', "Filename: $file",
         "$ntfy_url/$ntfy_topic"
     );
+
+    sleep(1);
+}
+
+sub rewrite_file {
+    my ( $file, $matches, $replacement ) = @_;
+
+    open( my $readhandle, '<', $file ) or die "failed to open $file: $!";
+    my @lines;
+    my $found = 0;
+    while ( my $line = <$readhandle> ) {
+        if ( index( $line, $matches ) != -1 ) {
+            $line  = $replacement;
+            $found = 1;
+        }
+        push @lines, $line;
+    }
+    close($readhandle) or die "failed to close $file: $!";
+
+    die "no line containing $matches found in $file" unless $found;
+
+    open( my $writehandle, '>', $file ) or die "failed to open $file: $!";
+    print $writehandle @lines           or die "failed to write $file: $!";
+    close($writehandle)                 or die "failed to close $file: $!";
+
+    say "Updated $file with $replacement";
+}
+
+sub cpu_count {
+    open( my $handle, '/proc/cpuinfo' ) or die "Can't open cpuinfo: $!\n";
+    my $count = scalar( map /^processor/, <$handle> );
+    close $handle;
+
+    return $count;
 }
 
 sub find_files {
diff --git a/scripts/runner.pl b/scripts/runner.pl
index f11b6c5..37bb704 100644
--- a/scripts/runner.pl
+++ b/scripts/runner.pl
@@ -32,43 +32,6 @@ my $fail_server        = "$fail_bin/generic-experiment-server";
 my $fail_inject        = "$fail_bin/generic-experiment-client";
 my $result_browser     = "$fail_bin/resultbrowser.py";
 
-sub update_db_config {
-    my ($experiment) = @_;
-
-    open( my $readhandle, '<', $remote_db_conf )
-      or die "failed to open db.conf: $!";
-    my @lines;
-    my $found = 0;
-    while ( my $line = <$readhandle> ) {
-        if ( rindex( $line, 'database=', 0 ) == 0 ) {
-            $line  = "database=${db_prefix}_$experiment\n";
-            $found = 1;
-        }
-        push @lines, $line;
-    }
-    close($readhandle) or die "failed to close db.conf: $!";
-
-    die "no database= line found in $remote_db_conf for some reason"
-      unless $found;
-
-    open( my $writehandle, '>', $remote_db_conf )
-      or die "failed to open db.conf: $!";
-    print $writehandle @lines or die "failed to write db.conf: $!";
-    close($writehandle)       or die "failed to close db.conf: $!";
-
-    say "Updated db.conf for database $db_prefix\_$experiment";
-}
-
-sub cpu_count {
-    open( my $handle, '/proc/cpuinfo' ) or die "Can't open cpuinfo: $!\n";
-    my $count = scalar( map /^processor/, <$handle> );
-    close $handle;
-
-    return $count;
-}
-
-my @experiments = Util::find_subdirs($remote_builds_dir);
-
 sub trace {
     my ($experiment) = @_;
 
@@ -194,8 +157,7 @@ sub import_trace {
 sub inject {
     my ($experiment) = @_;
 
-    # my $count = 1;
-    my $count = cpu_count();
+    my $count = Util::cpu_count();
 
     Util::notify("Injecting $experiment using $count cores...");
 
@@ -276,11 +238,13 @@ sub results {
 }
 
 # Run experiments
+my @experiments = Util::find_subdirs($remote_builds_dir);
 for my $experiment (@experiments) {
-    update_db_config($experiment);
+    Util::rewrite_file( $remote_db_conf, "database=",
+        "database=${db_prefix}_$experiment\n" );
 
-    # trace($experiment);
-    # import_trace($experiment);
-    # inject($experiment);
+    trace($experiment);
+    import_trace($experiment);
+    inject($experiment);
     results($experiment);
 }