diff --git a/integration/advent2013-day14.t b/integration/advent2013-day14.t
index da4f1ece93..c210d2bccb 100644
--- a/integration/advent2013-day14.t
+++ b/integration/advent2013-day14.t
@@ -79,143 +79,136 @@ my @currency_exchanges = (CurrencyExchange.new( :id<fast>, :delay(1) ),
 
 {
     {
-	my @files = qw<config1.ini config2.ini>;
-	my %config = read_all(@files);
-	is %config<font><size>, '10', 'combined config (font/size)';
-	is %config<font><style>, 'italic', 'combined config (font/style)';
-	is %config<font><color>, 'red', 'combined config (font/color)';
-	is %config<line><style>, 'dashed', 'combined config (line/style)';
+        my @files = qw<config1.ini config2.ini>;
+        my %config = read_all(@files);
+        is %config<font><size>, '10', 'combined config (font/size)';
+        is %config<font><style>, 'italic', 'combined config (font/style)';
+        is %config<font><color>, 'red', 'combined config (font/color)';
+        is %config<line><style>, 'dashed', 'combined config (line/style)';
     }
 
     sub read_all(@files) {
-	my $read = Channel.new;
-	my $parsed = Channel.new;
-	read_worker(@files, $read);
-	parse_worker($read, $parsed);
-	my %all_config = await config_combiner($parsed);
-	$read.close; $parsed.close;
-	return %all_config;
+        my $read = Channel.new;
+        my $parsed = Channel.new;
+        read_worker(@files, $read);
+        parse_worker($read, $parsed);
+        my %all_config = await config_combiner($parsed);
+        $read.close; $parsed.close;
+        return %all_config;
     }
 
     sub read_worker(@files, $dest) {
-
-	# simulated slurp()
-	sub Slurp($name) {
-	    my %files = (
-	     'config1.ini' => q:to"END1",
-	     [font]
-	     size = 10
-	     style = italic
-	     [line]
-	     style = dashed
-	     END1
-	     'config2.ini' => q:to"END2",
-	     [font]
-	     color = red
-	     [line]
-	     height = 0.5
-	     END2
-	   );
-	   return %files{$name}
-	}
-
-	start {
-	    for @files -> $file {
-		$dest.send( Slurp($file) );
-	    }
-	    $dest.close();
-	    CATCH { diag 'read_worker failure:' ~ $_; $dest.fail($_) }
-	}
+        # simulated slurp()
+        sub Slurp($name) {
+            my %files = (
+                'config1.ini' => q:to"END1",
+                [font]
+                size = 10
+                style = italic
+                [line]
+                style = dashed
+                END1
+                'config2.ini' => q:to"END2",
+                [font]
+                color = red
+                [line]
+                height = 0.5
+                END2
+            );
+            return %files{$name}
+        }
+
+        start {
+            for @files -> $file {
+                $dest.send( Slurp($file) );
+            }
+            $dest.close();
+            CATCH { diag 'read_worker failure:' ~ $_; $dest.fail($_) }
+        }
     }
 
     sub parse_worker($source, $dest) {
-	my grammar INIFile {
-	    token TOP {
-		^
-		<entries>
-		<section>+
-		$
-	    }
-
-	    token section {
-		'[' ~ ']' <key> \n
-		<entries>
-	    }
-
-	    token entries {
-		[
-		| <entry> \n
-		| \n
-		]*
-	    }
-
-	    rule entry { <key> '=' <value> }
-
-	    token key   { \w+ }
-	    token value { \N+ }
-
-	    token ws { \h* }
-	 }
-
-	my class INIFileActions {
-	    method TOP($/) {
-		my %result;
-		%result<_> = $<entries>.ast;
-		for @<section> -> $sec {
-		    %result{$sec<key>} = $sec<entries>.ast;
-		}
-		make %result;
-	    }
-
-	    method entries($/) {
-		my %entries;
-		for @<entry> -> $e {
-		    %entries{$e<key>} = ~$e<value>;
-		}
-		make %entries;
-	    }
+        my grammar INIFile {
+            token TOP {
+            ^
+            <entries>
+            <section>+
+            $
+            }
+    
+            token section {
+            '[' ~ ']' <key> \n
+            <entries>
+            }
+    
+            token entries {
+            [
+            | <entry> \n
+            | \n
+            ]*
+            }
+    
+            rule entry { <key> '=' <value> }
+    
+            token key   { \w+ }
+            token value { \N+ }
+    
+            token ws { \h* }
+        }
+
+        my class INIFileActions {
+            method TOP($/) {
+            my %result;
+            %result<_> = $<entries>.ast;
+            for @<section> -> $sec {
+                %result{$sec<key>} = $sec<entries>.ast;
+            }
+            make %result;
+            }
+    
+            method entries($/) {
+            my %entries;
+            for @<entry> -> $e {
+                %entries{$e<key>} = ~$e<value>;
+            }
+            make %entries;
+            }
+        }
+    
+        start {
+            react {
+                whenever $source {
+                    if INIFile.parse($_, :actions(INIFileActions)) -> $parsed {
+                        $dest.send($parsed.ast);
+                    }
+                    else {
+                        $dest.fail("Could not parse INI file");
+                        last;
+                    }
+                }
+            }
+            $dest.close();
+            CATCH { diag 'parse worker failure:' ~ $_; $dest.fail($_) }
+        }
 	}
 
-	start {
-	    loop {
-		earliest $source {
-		    more $source {
-			if INIFile.parse($_, :actions(INIFileActions)) -> $parsed {
-			    $dest.send($parsed.ast);
-			}
-			else {
-			    $dest.fail("Could not parse INI file");
-			    last;
-			}
-		    }
-		    done $source { last }
-		}
-	    }
-	    $dest.close();
-	    CATCH { diag 'parse worker failure:' ~ $_; $dest.fail($_) }
-	}
-    }
-
     sub config_combiner($source) {
-	my $p = Promise.new;
-	my $v = $p.vow;
-	start {
-	    my %result;
-	    loop {
-		earliest $source {
-		    more $source {
-			for %^content.kv -> $sec, %kvs {
-			    for %kvs.kv -> $k, $v {
-				%result{$sec}{$k} = $v;
-			    }
-			}
-		    }
-		    done $source { last }
-		}
-	    }
-	    $v.keep(%result);
-	    CATCH { diag "combiner failure:" ~ $_; $v.break($_) }
-	}
-	return $p;
+        my $p = Promise.new;
+        my $v = $p.vow;
+        start {
+            my %result;
+            react {
+                whenever $source {
+                    for %^content.kv -> $sec, %kvs {
+                        for %kvs.kv -> $k, $v {
+                            %result{$sec}{$k} = $v;
+                        }
+                    }
+                }
+            }
+            $v.keep(%result);
+            CATCH { diag "combiner failure:" ~ $_; $v.break($_) }
+        }
+        return $p;
     }
 }