diff --git a/nixos/lib/test-driver/log2html.xsl b/nixos/lib/test-driver/log2html.xsl
deleted file mode 100644
index 0485412b4c8..00000000000
--- a/nixos/lib/test-driver/log2html.xsl
+++ /dev/null
@@ -1,135 +0,0 @@
-<?xml version="1.0"?>
-
-<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
-
-  <xsl:output method='html' encoding="UTF-8"
-              doctype-public="-//W3C//DTD HTML 4.01//EN"
-              doctype-system="http://www.w3.org/TR/html4/strict.dtd" />
-
-  <xsl:template match="logfile">
-    <html>
-      <head>
-        <script type="text/javascript" src="jquery.min.js"></script>
-        <script type="text/javascript" src="jquery-ui.min.js"></script>
-        <script type="text/javascript" src="treebits.js" />
-        <link rel="stylesheet" href="logfile.css" type="text/css" />
-        <title>Log File</title>
-      </head>
-      <body>
-        <h1>VM build log</h1>
-        <p>
-          <a href="javascript:" class="logTreeExpandAll">Expand all</a> |
-          <a href="javascript:" class="logTreeCollapseAll">Collapse all</a>
-        </p>
-        <ul class='toplevel'>
-          <xsl:for-each select='line|nest'>
-            <li>
-              <xsl:apply-templates select='.'/>
-            </li>
-          </xsl:for-each>
-        </ul>
-
-        <xsl:if test=".//*[@image]">
-          <h1>Screenshots</h1>
-          <ul class="vmScreenshots">
-            <xsl:for-each select='.//*[@image]'>
-              <li><a href="{@image}"><xsl:value-of select="@image" /></a></li>
-            </xsl:for-each>
-          </ul>
-        </xsl:if>
-
-      </body>
-    </html>
-  </xsl:template>
-
-
-  <xsl:template match="nest">
-
-    <!-- The tree should be collapsed by default if all children are
-         unimportant or if the header is unimportant. -->
-    <xsl:variable name="collapsed" select="not(./head[@expanded]) and count(.//*[@error]) = 0"/>
-
-    <xsl:variable name="style"><xsl:if test="$collapsed">display: none;</xsl:if></xsl:variable>
-
-    <xsl:if test="line|nest">
-      <a href="javascript:" class="logTreeToggle">
-        <xsl:choose>
-          <xsl:when test="$collapsed"><xsl:text>+</xsl:text></xsl:when>
-          <xsl:otherwise><xsl:text>-</xsl:text></xsl:otherwise>
-        </xsl:choose>
-      </a>
-      <xsl:text> </xsl:text>
-    </xsl:if>
-
-    <xsl:apply-templates select='head'/>
-
-    <!-- Be careful to only generate <ul>s if there are <li>s, otherwise it’s malformed. -->
-    <xsl:if test="line|nest">
-
-      <ul class='nesting' style="{$style}">
-        <xsl:for-each select='line|nest'>
-
-          <!-- Is this the last line?  If so, mark it as such so that it
-               can be rendered differently. -->
-          <xsl:variable name="class"><xsl:choose><xsl:when test="position() != last()">line</xsl:when><xsl:otherwise>lastline</xsl:otherwise></xsl:choose></xsl:variable>
-
-          <li class='{$class}'>
-            <span class='lineconn' />
-            <span class='linebody'>
-              <xsl:apply-templates select='.'/>
-            </span>
-          </li>
-        </xsl:for-each>
-      </ul>
-    </xsl:if>
-
-  </xsl:template>
-
-
-  <xsl:template match="head|line">
-    <code>
-      <xsl:if test="@error">
-        <xsl:attribute name="class">errorLine</xsl:attribute>
-      </xsl:if>
-      <xsl:if test="@warning">
-        <xsl:attribute name="class">warningLine</xsl:attribute>
-      </xsl:if>
-      <xsl:if test="@priority = 3">
-        <xsl:attribute name="class">prio3</xsl:attribute>
-      </xsl:if>
-
-      <xsl:if test="@type = 'serial'">
-        <xsl:attribute name="class">serial</xsl:attribute>
-      </xsl:if>
-
-      <xsl:if test="@machine">
-        <xsl:choose>
-          <xsl:when test="@type = 'serial'">
-            <span class="machine"><xsl:value-of select="@machine"/># </span>
-          </xsl:when>
-          <xsl:otherwise>
-            <span class="machine"><xsl:value-of select="@machine"/>: </span>
-          </xsl:otherwise>
-        </xsl:choose>
-      </xsl:if>
-
-      <xsl:choose>
-        <xsl:when test="@image">
-          <a href="{@image}"><xsl:apply-templates/></a>
-        </xsl:when>
-        <xsl:otherwise>
-          <xsl:apply-templates/>
-        </xsl:otherwise>
-      </xsl:choose>
-    </code>
-  </xsl:template>
-
-
-  <xsl:template match="storeref">
-    <em class='storeref'>
-      <span class='popup'><xsl:apply-templates/></span>
-      <span class='elided'>/...</span><xsl:apply-templates select='name'/><xsl:apply-templates select='path'/>
-    </em>
-  </xsl:template>
-
-</xsl:stylesheet>
diff --git a/nixos/lib/test-driver/logfile.css b/nixos/lib/test-driver/logfile.css
deleted file mode 100644
index a54d8504a86..00000000000
--- a/nixos/lib/test-driver/logfile.css
+++ /dev/null
@@ -1,129 +0,0 @@
-body {
-    font-family: sans-serif;
-    background: white;
-}
-
-h1
-{
-    color: #005aa0;
-    font-size: 180%;
-}
-
-a {
-    text-decoration: none;
-}
-
-
-ul.nesting, ul.toplevel {
-    padding: 0;
-    margin: 0;
-}
-
-ul.toplevel {
-    list-style-type: none;
-}
-
-.line, .head {
-    padding-top: 0em;
-}
-
-ul.nesting li.line, ul.nesting li.lastline {
-    position: relative;
-    list-style-type: none;
-}
-
-ul.nesting li.line {
-    padding-left: 2.0em;
-}
-
-ul.nesting li.lastline {
-    padding-left: 2.1em; /* for the 0.1em border-left in .lastline > .lineconn */
-}
-
-li.line {
-    border-left: 0.1em solid #6185a0;
-}
-
-li.line > span.lineconn, li.lastline > span.lineconn {
-    position: absolute;
-    height: 0.65em;
-    left: 0em;
-    width: 1.5em;
-    border-bottom: 0.1em solid #6185a0;
-}
-
-li.lastline > span.lineconn {
-    border-left: 0.1em solid #6185a0;
-}
-
-
-em.storeref {
-    color: #500000;
-    position: relative; 
-    width: 100%;
-}
-
-em.storeref:hover {
-    background-color: #eeeeee;
-}
-
-*.popup {
-    display: none;
-/*    background: url('http://losser.st-lab.cs.uu.nl/~mbravenb/menuback.png') repeat; */
-    background: #ffffcd;
-    border: solid #555555 1px;
-    position: absolute;
-    top: 0em;
-    left: 0em;
-    margin: 0;
-    padding: 0;
-    z-index: 100;
-}
-
-em.storeref:hover span.popup {
-    display: inline;
-    width: 40em;
-}
-
-
-.logTreeToggle {
-    text-decoration: none;
-    font-family: monospace;
-    font-size: larger;
-}
-
-.errorLine {
-    color: #ff0000;
-    font-weight: bold;
-}
-
-.warningLine {
-    color: darkorange;
-    font-weight: bold;
-}
-
-.prio3 {
-    font-style: italic;
-}
-
-code {
-    white-space: pre-wrap;
-}
-
-.serial {
-    color: #56115c;
-}
-
-.machine {
-    color: #002399;
-    font-style: italic;
-}
-
-ul.vmScreenshots {
-    padding-left: 1em;
-}
-
-ul.vmScreenshots li {
-    font-family: monospace;
-    list-style: square;
-}
diff --git a/nixos/lib/test-driver/treebits.js b/nixos/lib/test-driver/treebits.js
deleted file mode 100644
index 9754093dfd0..00000000000
--- a/nixos/lib/test-driver/treebits.js
+++ /dev/null
@@ -1,30 +0,0 @@
-$(document).ready(function() {
-
-    /* When a toggle is clicked, show or hide the subtree. */
-    $(".logTreeToggle").click(function() {
-        if ($(this).siblings("ul:hidden").length != 0) {
-            $(this).siblings("ul").show();
-            $(this).text("-");
-        } else {
-            $(this).siblings("ul").hide();
-            $(this).text("+");
-        }
-    });
-
-    /* Implementation of the expand all link. */
-    $(".logTreeExpandAll").click(function() {
-        $(".logTreeToggle", $(this).parent().siblings(".toplevel")).map(function() {
-            $(this).siblings("ul").show();
-            $(this).text("-");
-        });
-    });
-
-    /* Implementation of the collapse all link. */
-    $(".logTreeCollapseAll").click(function() {
-        $(".logTreeToggle", $(this).parent().siblings(".toplevel")).map(function() {
-            $(this).siblings("ul").hide();
-            $(this).text("+");
-        });
-    });
-
-});
diff --git a/nixos/lib/testing-python.nix b/nixos/lib/testing-python.nix
index 3891adc1043..88801f20517 100644
--- a/nixos/lib/testing-python.nix
+++ b/nixos/lib/testing-python.nix
@@ -62,25 +62,11 @@ in rec {
 
       requiredSystemFeatures = [ "kvm" "nixos-test" ];
 
-      buildInputs = [ libxslt ];
-
       buildCommand =
         ''
-          mkdir -p $out/nix-support
+          mkdir -p $out
 
-          LOGFILE=$out/log.xml tests='exec(os.environ["testScript"])' ${driver}/bin/nixos-test-driver
-
-          # Generate a pretty-printed log.
-          xsltproc --output $out/log.html ${./test-driver/log2html.xsl} $out/log.xml
-          ln -s ${./test-driver/logfile.css} $out/logfile.css
-          ln -s ${./test-driver/treebits.js} $out/treebits.js
-          ln -s ${jquery}/js/jquery.min.js $out/
-          ln -s ${jquery}/js/jquery.js $out/
-          ln -s ${jquery-ui}/js/jquery-ui.min.js $out/
-          ln -s ${jquery-ui}/js/jquery-ui.js $out/
-
-          touch $out/nix-support/hydra-build-products
-          echo "report testlog $out log.html" >> $out/nix-support/hydra-build-products
+          LOGFILE=/dev/null tests='exec(os.environ["testScript"])' ${driver}/bin/nixos-test-driver
 
           for i in */xchg/coverage-data; do
             mkdir -p $out/coverage-data
diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index 7d6a5c0a290..cbb7faf039e 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -58,23 +58,11 @@ in rec {
 
       requiredSystemFeatures = [ "kvm" "nixos-test" ];
 
-      buildInputs = [ libxslt ];
-
       buildCommand =
         ''
-          mkdir -p $out/nix-support
+          mkdir -p $out
 
-          LOGFILE=$out/log.xml tests='eval $ENV{testScript}; die $@ if $@;' ${driver}/bin/nixos-test-driver
-
-          # Generate a pretty-printed log.
-          xsltproc --output $out/log.html ${./test-driver/log2html.xsl} $out/log.xml
-          ln -s ${./test-driver/logfile.css} $out/logfile.css
-          ln -s ${./test-driver/treebits.js} $out/treebits.js
-          ln -s ${jquery}/js/jquery.min.js $out/
-          ln -s ${jquery-ui}/js/jquery-ui.min.js $out/
-
-          touch $out/nix-support/hydra-build-products
-          echo "report testlog $out log.html" >> $out/nix-support/hydra-build-products
+          LOGFILE=/dev/null tests='eval $ENV{testScript}; die $@ if $@;' ${driver}/bin/nixos-test-driver
 
           for i in */xchg/coverage-data; do
             mkdir -p $out/coverage-data
