diff --git a/Library/Homebrew/cask/spec/cask/system_command_result_spec.rb b/Library/Homebrew/cask/spec/cask/system_command_result_spec.rb
new file mode 100644
index 0000000000..7eb4fb722d
--- /dev/null
+++ b/Library/Homebrew/cask/spec/cask/system_command_result_spec.rb
@@ -0,0 +1,49 @@
+require "spec_helper"
+
+describe Hbc::SystemCommand::Result do
+  describe "::_parse_plist" do
+    let(:command) { Hbc::SystemCommand.new("/usr/bin/true", {}) }
+    let(:hdiutil_output) {
+      <<-EOS.undent
+        Hello there! I am in no way XML am I?!?!
+
+          That's a little silly... you were expexting XML here!
+
+        What is a parser to do?
+
+        Hopefully <not> explode!
+
+        <?xml version="1.0" encoding="UTF-8"?>
+        <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+        <plist version="1.0">
+        <dict>
+          <key>system-entities</key>
+          <array>
+            <dict>
+              <key>content-hint</key>
+              <string>Apple_HFS</string>
+              <key>dev-entry</key>
+              <string>/dev/disk3s2</string>
+              <key>mount-point</key>
+              <string>/private/tmp/dmg.BhfS2g</string>
+              <key>potentially-mountable</key>
+              <true/>
+              <key>unmapped-content-hint</key>
+              <string>Apple_HFS</string>
+              <key>volume-kind</key>
+              <string>hfs</string>
+            </dict>
+          </array>
+        </dict>
+        </plist>
+      EOS
+    }
+
+    it "ignores garbage output before xml starts" do
+      parsed = described_class._parse_plist(command, hdiutil_output)
+
+      expect(parsed.keys).to eq(["system-entities"])
+      expect(parsed["system-entities"].length).to eq(1)
+    end
+  end
+end
diff --git a/Library/Homebrew/cask/test/plist/parser_test.rb b/Library/Homebrew/cask/test/plist/parser_test.rb
index a73d1f7f58..173541a727 100644
--- a/Library/Homebrew/cask/test/plist/parser_test.rb
+++ b/Library/Homebrew/cask/test/plist/parser_test.rb
@@ -2,51 +2,51 @@ require "test_helper"
 
 describe Plist do
   it "parses some hdiutil output okay" do
-    hdiutil_output = <<-HDIUTILOUTPUT
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-  <key>system-entities</key>
-  <array>
-    <dict>
-      <key>content-hint</key>
-      <string>Apple_partition_map</string>
-      <key>dev-entry</key>
-      <string>/dev/disk3s1</string>
-      <key>potentially-mountable</key>
-      <false/>
-      <key>unmapped-content-hint</key>
-      <string>Apple_partition_map</string>
-    </dict>
-    <dict>
-      <key>content-hint</key>
-      <string>Apple_partition_scheme</string>
-      <key>dev-entry</key>
-      <string>/dev/disk3</string>
-      <key>potentially-mountable</key>
-      <false/>
-      <key>unmapped-content-hint</key>
-      <string>Apple_partition_scheme</string>
-    </dict>
-    <dict>
-      <key>content-hint</key>
-      <string>Apple_HFS</string>
-      <key>dev-entry</key>
-      <string>/dev/disk3s2</string>
-      <key>mount-point</key>
-      <string>/private/tmp/dmg.BhfS2g</string>
-      <key>potentially-mountable</key>
-      <true/>
-      <key>unmapped-content-hint</key>
-      <string>Apple_HFS</string>
-      <key>volume-kind</key>
-      <string>hfs</string>
-    </dict>
-  </array>
-</dict>
-</plist>
-    HDIUTILOUTPUT
+    hdiutil_output = <<-EOS.undent
+      <?xml version="1.0" encoding="UTF-8"?>
+      <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+      <plist version="1.0">
+      <dict>
+        <key>system-entities</key>
+        <array>
+          <dict>
+            <key>content-hint</key>
+            <string>Apple_partition_map</string>
+            <key>dev-entry</key>
+            <string>/dev/disk3s1</string>
+            <key>potentially-mountable</key>
+            <false/>
+            <key>unmapped-content-hint</key>
+            <string>Apple_partition_map</string>
+          </dict>
+          <dict>
+            <key>content-hint</key>
+            <string>Apple_partition_scheme</string>
+            <key>dev-entry</key>
+            <string>/dev/disk3</string>
+            <key>potentially-mountable</key>
+            <false/>
+            <key>unmapped-content-hint</key>
+            <string>Apple_partition_scheme</string>
+          </dict>
+          <dict>
+            <key>content-hint</key>
+            <string>Apple_HFS</string>
+            <key>dev-entry</key>
+            <string>/dev/disk3s2</string>
+            <key>mount-point</key>
+            <string>/private/tmp/dmg.BhfS2g</string>
+            <key>potentially-mountable</key>
+            <true/>
+            <key>unmapped-content-hint</key>
+            <string>Apple_HFS</string>
+            <key>volume-kind</key>
+            <string>hfs</string>
+          </dict>
+        </array>
+      </dict>
+      </plist>
+    EOS
 
     parsed = Plist.parse_xml(hdiutil_output)
 
@@ -59,47 +59,6 @@ describe Plist do
                                                                     ]
   end
 
-  it "can ignore garbage output before xml starts" do
-    hdiutil_output = <<-HDIUTILOUTPUT
-Hello there! I am in no way XML am I?!?!
-
-  That's a little silly... you were expexting XML here!
-
-What is a parser to do?
-
-Hopefully <not> explode!
-
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-  <key>system-entities</key>
-  <array>
-    <dict>
-      <key>content-hint</key>
-      <string>Apple_HFS</string>
-      <key>dev-entry</key>
-      <string>/dev/disk3s2</string>
-      <key>mount-point</key>
-      <string>/private/tmp/dmg.BhfS2g</string>
-      <key>potentially-mountable</key>
-      <true/>
-      <key>unmapped-content-hint</key>
-      <string>Apple_HFS</string>
-      <key>volume-kind</key>
-      <string>hfs</string>
-    </dict>
-  </array>
-</dict>
-</plist>
-    HDIUTILOUTPUT
-
-    parsed = Plist.parse_xml(hdiutil_output)
-
-    parsed.keys.must_equal ["system-entities"]
-    parsed["system-entities"].length.must_equal 1
-  end
-
   it "does not choke on empty input" do
     Plist.parse_xml("").must_equal {}
   end