diff --git a/transform/chain_test.go b/transform/chain_test.go
index cb8f3d368..a0ae358d6 100644
--- a/transform/chain_test.go
+++ b/transform/chain_test.go
@@ -22,93 +22,104 @@ import (
 	"testing"
 )
 
-const h5JsContentDoubleQuote = "<!DOCTYPE html><html><head><script src=\"foobar.js\"></script><script src=\"/barfoo.js\"></script></head><body><nav><h1>title</h1></nav><article>content <a href=\"foobar\">foobar</a>. <a href=\"/foobar\">Follow up</a></article></body></html>"
-const h5JsContentSingleQuote = "<!DOCTYPE html><html><head><script src='foobar.js'></script><script src='/barfoo.js'></script></head><body><nav><h1>title</h1></nav><article>content <a href='foobar'>foobar</a>. <a href='/foobar'>Follow up</a></article></body></html>"
-const h5JsContentAbsURL = "<!DOCTYPE html><html><head><script src=\"http://user@host:10234/foobar.js\"></script></head><body><nav><h1>title</h1></nav><article>content <a href=\"https://host/foobar\">foobar</a>. Follow up</article></body></html>"
-const h5JsContentAbsURLSchemaless = "<!DOCTYPE html><html><head><script src=\"//host/foobar.js\"></script><script src='//host2/barfoo.js'></head><body><nav><h1>title</h1></nav><article>content <a href=\"//host/foobar\">foobar</a>. <a href='//host2/foobar'>Follow up</a></article></body></html>"
-const corectOutputSrcHrefDq = "<!DOCTYPE html><html><head><script src=\"foobar.js\"></script><script src=\"http://base/barfoo.js\"></script></head><body><nav><h1>title</h1></nav><article>content <a href=\"foobar\">foobar</a>. <a href=\"http://base/foobar\">Follow up</a></article></body></html>"
-const corectOutputSrcHrefSq = "<!DOCTYPE html><html><head><script src='foobar.js'></script><script src='http://base/barfoo.js'></script></head><body><nav><h1>title</h1></nav><article>content <a href='foobar'>foobar</a>. <a href='http://base/foobar'>Follow up</a></article></body></html>"
+const (
+	h5JsContentDoubleQuote      = "<!DOCTYPE html><html><head><script src=\"foobar.js\"></script><script src=\"/barfoo.js\"></script></head><body><nav><h1>title</h1></nav><article>content <a href=\"foobar\">foobar</a>. <a href=\"/foobar\">Follow up</a></article></body></html>"
+	h5JsContentSingleQuote      = "<!DOCTYPE html><html><head><script src='foobar.js'></script><script src='/barfoo.js'></script></head><body><nav><h1>title</h1></nav><article>content <a href='foobar'>foobar</a>. <a href='/foobar'>Follow up</a></article></body></html>"
+	h5JsContentAbsURL           = "<!DOCTYPE html><html><head><script src=\"http://user@host:10234/foobar.js\"></script></head><body><nav><h1>title</h1></nav><article>content <a href=\"https://host/foobar\">foobar</a>. Follow up</article></body></html>"
+	h5JsContentAbsURLSchemaless = "<!DOCTYPE html><html><head><script src=\"//host/foobar.js\"></script><script src='//host2/barfoo.js'></head><body><nav><h1>title</h1></nav><article>content <a href=\"//host/foobar\">foobar</a>. <a href='//host2/foobar'>Follow up</a></article></body></html>"
+	corectOutputSrcHrefDq       = "<!DOCTYPE html><html><head><script src=\"foobar.js\"></script><script src=\"http://base/barfoo.js\"></script></head><body><nav><h1>title</h1></nav><article>content <a href=\"foobar\">foobar</a>. <a href=\"http://base/foobar\">Follow up</a></article></body></html>"
+	corectOutputSrcHrefSq       = "<!DOCTYPE html><html><head><script src='foobar.js'></script><script src='http://base/barfoo.js'></script></head><body><nav><h1>title</h1></nav><article>content <a href='foobar'>foobar</a>. <a href='http://base/foobar'>Follow up</a></article></body></html>"
 
-const h5XMLXontentAbsURL = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><feed xmlns=\"http://www.w3.org/2005/Atom\"><entry><content type=\"html\">&lt;p&gt;&lt;a href=&#34;/foobar&#34;&gt;foobar&lt;/a&gt;&lt;/p&gt; &lt;p&gt;A video: &lt;iframe src=&#39;/foo&#39;&gt;&lt;/iframe&gt;&lt;/p&gt;</content></entry></feed>"
-const correctOutputSrcHrefInXML = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><feed xmlns=\"http://www.w3.org/2005/Atom\"><entry><content type=\"html\">&lt;p&gt;&lt;a href=&#34;http://base/foobar&#34;&gt;foobar&lt;/a&gt;&lt;/p&gt; &lt;p&gt;A video: &lt;iframe src=&#39;http://base/foo&#39;&gt;&lt;/iframe&gt;&lt;/p&gt;</content></entry></feed>"
-const h5XMLContentGuarded = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><feed xmlns=\"http://www.w3.org/2005/Atom\"><entry><content type=\"html\">&lt;p&gt;&lt;a href=&#34;//foobar&#34;&gt;foobar&lt;/a&gt;&lt;/p&gt; &lt;p&gt;A video: &lt;iframe src=&#39;//foo&#39;&gt;&lt;/iframe&gt;&lt;/p&gt;</content></entry></feed>"
+	h5XMLXontentAbsURL        = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><feed xmlns=\"http://www.w3.org/2005/Atom\"><entry><content type=\"html\">&lt;p&gt;&lt;a href=&#34;/foobar&#34;&gt;foobar&lt;/a&gt;&lt;/p&gt; &lt;p&gt;A video: &lt;iframe src=&#39;/foo&#39;&gt;&lt;/iframe&gt;&lt;/p&gt;</content></entry></feed>"
+	correctOutputSrcHrefInXML = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><feed xmlns=\"http://www.w3.org/2005/Atom\"><entry><content type=\"html\">&lt;p&gt;&lt;a href=&#34;http://base/foobar&#34;&gt;foobar&lt;/a&gt;&lt;/p&gt; &lt;p&gt;A video: &lt;iframe src=&#39;http://base/foo&#39;&gt;&lt;/iframe&gt;&lt;/p&gt;</content></entry></feed>"
+	h5XMLContentGuarded       = "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?><feed xmlns=\"http://www.w3.org/2005/Atom\"><entry><content type=\"html\">&lt;p&gt;&lt;a href=&#34;//foobar&#34;&gt;foobar&lt;/a&gt;&lt;/p&gt; &lt;p&gt;A video: &lt;iframe src=&#39;//foo&#39;&gt;&lt;/iframe&gt;&lt;/p&gt;</content></entry></feed>"
+)
 
-// additional sanity tests for replacements testing
-const replace1 = "No replacements."
-const replace2 = "ᚠᛇᚻ ᛒᛦᚦ ᚠᚱᚩᚠᚢᚱ\nᚠᛁᚱᚪ ᚷᛖᚻᚹᛦᛚᚳᚢᛗ"
-const replace3 = `End of file: src="/`
-const replace4 = `End of file: srcset="/`
-const replace5 = `Srcsett with no closing quote: srcset="/img/small.jpg do be do be do.`
+const (
+	// additional sanity tests for replacements testing
+	replace1 = "No replacements."
+	replace2 = "ᚠᛇᚻ ᛒᛦᚦ ᚠᚱᚩᚠᚢᚱ\nᚠᛁᚱᚪ ᚷᛖᚻᚹᛦᛚᚳᚢᛗ"
+	replace3 = `End of file: src="/`
+	replace4 = `End of file: srcset="/`
+	replace5 = `Srcsett with no closing quote: srcset="/img/small.jpg do be do be do.`
 
-// Issue: 816, schemaless links combined with others
-const replaceSchemalessHTML = `Pre. src='//schemaless' src='/normal'  <a href="//schemaless">Schemaless</a>. <a href="/normal">normal</a>. Post.`
-const replaceSchemalessHTMLCorrect = `Pre. src='//schemaless' src='http://base/normal'  <a href="//schemaless">Schemaless</a>. <a href="http://base/normal">normal</a>. Post.`
-const replaceSchemalessXML = `Pre. src=&#39;//schemaless&#39; src=&#39;/normal&#39;  <a href=&#39;//schemaless&#39;>Schemaless</a>. <a href=&#39;/normal&#39;>normal</a>. Post.`
-const replaceSchemalessXMLCorrect = `Pre. src=&#39;//schemaless&#39; src=&#39;http://base/normal&#39;  <a href=&#39;//schemaless&#39;>Schemaless</a>. <a href=&#39;http://base/normal&#39;>normal</a>. Post.`
+	// Issue: 816, schemaless links combined with others
+	replaceSchemalessHTML        = `Pre. src='//schemaless' src='/normal'  <a href="//schemaless">Schemaless</a>. <a href="/normal">normal</a>. Post.`
+	replaceSchemalessHTMLCorrect = `Pre. src='//schemaless' src='http://base/normal'  <a href="//schemaless">Schemaless</a>. <a href="http://base/normal">normal</a>. Post.`
+	replaceSchemalessXML         = `Pre. src=&#39;//schemaless&#39; src=&#39;/normal&#39;  <a href=&#39;//schemaless&#39;>Schemaless</a>. <a href=&#39;/normal&#39;>normal</a>. Post.`
+	replaceSchemalessXMLCorrect  = `Pre. src=&#39;//schemaless&#39; src=&#39;http://base/normal&#39;  <a href=&#39;//schemaless&#39;>Schemaless</a>. <a href=&#39;http://base/normal&#39;>normal</a>. Post.`
+)
 
-// srcset=
-const srcsetBasic = `Pre. <img srcset="/img/small.jpg 200w, /img/medium.jpg 300w, /img/big.jpg 700w" alt="text" src="/img/foo.jpg">`
-const srcsetBasicCorrect = `Pre. <img srcset="http://base/img/small.jpg 200w, http://base/img/medium.jpg 300w, http://base/img/big.jpg 700w" alt="text" src="http://base/img/foo.jpg">`
-const srcsetSingleQuote = `Pre. <img srcset='/img/small.jpg 200w, /img/big.jpg 700w' alt="text" src="/img/foo.jpg"> POST.`
-const srcsetSingleQuoteCorrect = `Pre. <img srcset='http://base/img/small.jpg 200w, http://base/img/big.jpg 700w' alt="text" src="http://base/img/foo.jpg"> POST.`
-const srcsetXMLBasic = `Pre. <img srcset=&#34;/img/small.jpg 200w, /img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;/img/foo.jpg&#34;>`
-const srcsetXMLBasicCorrect = `Pre. <img srcset=&#34;http://base/img/small.jpg 200w, http://base/img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;http://base/img/foo.jpg&#34;>`
-const srcsetXMLSingleQuote = `Pre. <img srcset=&#34;/img/small.jpg 200w, /img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;/img/foo.jpg&#34;>`
-const srcsetXMLSingleQuoteCorrect = `Pre. <img srcset=&#34;http://base/img/small.jpg 200w, http://base/img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;http://base/img/foo.jpg&#34;>`
-const srcsetVariations = `Pre. 
+const (
+	// srcset=
+	srcsetBasic                 = `Pre. <img srcset="/img/small.jpg 200w, /img/medium.jpg 300w, /img/big.jpg 700w" alt="text" src="/img/foo.jpg">`
+	srcsetBasicCorrect          = `Pre. <img srcset="http://base/img/small.jpg 200w, http://base/img/medium.jpg 300w, http://base/img/big.jpg 700w" alt="text" src="http://base/img/foo.jpg">`
+	srcsetSingleQuote           = `Pre. <img srcset='/img/small.jpg 200w, /img/big.jpg 700w' alt="text" src="/img/foo.jpg"> POST.`
+	srcsetSingleQuoteCorrect    = `Pre. <img srcset='http://base/img/small.jpg 200w, http://base/img/big.jpg 700w' alt="text" src="http://base/img/foo.jpg"> POST.`
+	srcsetXMLBasic              = `Pre. <img srcset=&#34;/img/small.jpg 200w, /img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;/img/foo.jpg&#34;>`
+	srcsetXMLBasicCorrect       = `Pre. <img srcset=&#34;http://base/img/small.jpg 200w, http://base/img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;http://base/img/foo.jpg&#34;>`
+	srcsetXMLSingleQuote        = `Pre. <img srcset=&#34;/img/small.jpg 200w, /img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;/img/foo.jpg&#34;>`
+	srcsetXMLSingleQuoteCorrect = `Pre. <img srcset=&#34;http://base/img/small.jpg 200w, http://base/img/big.jpg 700w&#34; alt=&#34;text&#34; src=&#34;http://base/img/foo.jpg&#34;>`
+	srcsetVariations            = `Pre. 
 Missing start quote: <img srcset=/img/small.jpg 200w, /img/big.jpg 700w" alt="text"> src='/img/foo.jpg'> FOO. 
 <img srcset='/img.jpg'> 
 schemaless: <img srcset='//img.jpg' src='//basic.jpg'>
 schemaless2: <img srcset="//img.jpg" src="//basic.jpg2> POST
 `
-const srcsetVariationsCorrect = `Pre. 
+)
+
+const (
+	srcsetVariationsCorrect = `Pre. 
 Missing start quote: <img srcset=/img/small.jpg 200w, /img/big.jpg 700w" alt="text"> src='http://base/img/foo.jpg'> FOO. 
 <img srcset='http://base/img.jpg'> 
 schemaless: <img srcset='//img.jpg' src='//basic.jpg'>
 schemaless2: <img srcset="//img.jpg" src="//basic.jpg2> POST
 `
-const srcsetXMLVariations = `Pre. 
+	srcsetXMLVariations = `Pre. 
 Missing start quote: &lt;img srcset=/img/small.jpg 200w /img/big.jpg 700w&quot; alt=&quot;text&quot;&gt; src=&#39;/img/foo.jpg&#39;&gt; FOO. 
 &lt;img srcset=&#39;/img.jpg&#39;&gt; 
 schemaless: &lt;img srcset=&#39;//img.jpg&#39; src=&#39;//basic.jpg&#39;&gt;
 schemaless2: &lt;img srcset=&quot;//img.jpg&quot; src=&quot;//basic.jpg2&gt; POST
 `
-const srcsetXMLVariationsCorrect = `Pre. 
+	srcsetXMLVariationsCorrect = `Pre. 
 Missing start quote: &lt;img srcset=/img/small.jpg 200w /img/big.jpg 700w&quot; alt=&quot;text&quot;&gt; src=&#39;http://base/img/foo.jpg&#39;&gt; FOO. 
 &lt;img srcset=&#39;http://base/img.jpg&#39;&gt; 
 schemaless: &lt;img srcset=&#39;//img.jpg&#39; src=&#39;//basic.jpg&#39;&gt;
 schemaless2: &lt;img srcset=&quot;//img.jpg&quot; src=&quot;//basic.jpg2&gt; POST
 `
 
-const relPathVariations = `PRE. a href="/img/small.jpg" POST.`
-const relPathVariationsCorrect = `PRE. a href="../../img/small.jpg" POST.`
+	relPathVariations        = `PRE. a href="/img/small.jpg" POST.`
+	relPathVariationsCorrect = `PRE. a href="../../img/small.jpg" POST.`
 
-const testBaseURL = "http://base/"
+	testBaseURL = "http://base/"
+)
 
-var absURLlBenchTests = []test{
-	{h5JsContentDoubleQuote, corectOutputSrcHrefDq},
-	{h5JsContentSingleQuote, corectOutputSrcHrefSq},
-	{h5JsContentAbsURL, h5JsContentAbsURL},
-	{h5JsContentAbsURLSchemaless, h5JsContentAbsURLSchemaless},
-}
+var (
+	absURLlBenchTests = []test{
+		{h5JsContentDoubleQuote, corectOutputSrcHrefDq},
+		{h5JsContentSingleQuote, corectOutputSrcHrefSq},
+		{h5JsContentAbsURL, h5JsContentAbsURL},
+		{h5JsContentAbsURLSchemaless, h5JsContentAbsURLSchemaless},
+	}
 
-var xmlAbsURLBenchTests = []test{
-	{h5XMLXontentAbsURL, correctOutputSrcHrefInXML},
-	{h5XMLContentGuarded, h5XMLContentGuarded},
-}
+	xmlAbsURLBenchTests = []test{
+		{h5XMLXontentAbsURL, correctOutputSrcHrefInXML},
+		{h5XMLContentGuarded, h5XMLContentGuarded},
+	}
 
-var sanityTests = []test{{replace1, replace1}, {replace2, replace2}, {replace3, replace3}, {replace3, replace3}, {replace5, replace5}}
-var extraTestsHTML = []test{{replaceSchemalessHTML, replaceSchemalessHTMLCorrect}}
-var absURLTests = append(absURLlBenchTests, append(sanityTests, extraTestsHTML...)...)
-var extraTestsXML = []test{{replaceSchemalessXML, replaceSchemalessXMLCorrect}}
-var xmlAbsURLTests = append(xmlAbsURLBenchTests, append(sanityTests, extraTestsXML...)...)
-var srcsetTests = []test{{srcsetBasic, srcsetBasicCorrect}, {srcsetSingleQuote, srcsetSingleQuoteCorrect}, {srcsetVariations, srcsetVariationsCorrect}}
-var srcsetXMLTests = []test{
-	{srcsetXMLBasic, srcsetXMLBasicCorrect},
-	{srcsetXMLSingleQuote, srcsetXMLSingleQuoteCorrect},
-	{srcsetXMLVariations, srcsetXMLVariationsCorrect}}
+	sanityTests    = []test{{replace1, replace1}, {replace2, replace2}, {replace3, replace3}, {replace3, replace3}, {replace5, replace5}}
+	extraTestsHTML = []test{{replaceSchemalessHTML, replaceSchemalessHTMLCorrect}}
+	absURLTests    = append(absURLlBenchTests, append(sanityTests, extraTestsHTML...)...)
+	extraTestsXML  = []test{{replaceSchemalessXML, replaceSchemalessXMLCorrect}}
+	xmlAbsURLTests = append(xmlAbsURLBenchTests, append(sanityTests, extraTestsXML...)...)
+	srcsetTests    = []test{{srcsetBasic, srcsetBasicCorrect}, {srcsetSingleQuote, srcsetSingleQuoteCorrect}, {srcsetVariations, srcsetVariationsCorrect}}
+	srcsetXMLTests = []test{
+		{srcsetXMLBasic, srcsetXMLBasicCorrect},
+		{srcsetXMLSingleQuote, srcsetXMLSingleQuoteCorrect},
+		{srcsetXMLVariations, srcsetXMLVariationsCorrect}}
 
-var relurlTests = []test{{relPathVariations, relPathVariationsCorrect}}
+	relurlTests = []test{{relPathVariations, relPathVariationsCorrect}}
+)
 
 func TestChainZeroTransformers(t *testing.T) {
 	tr := NewChain()
