diff --git a/content/canvas/test/webgl/conformance/textures/texture-active-bind.html b/content/canvas/test/webgl/conformance/textures/texture-active-bind.html
index 69ec18e469a..6cedd1ed771 100644
--- a/content/canvas/test/webgl/conformance/textures/texture-active-bind.html
+++ b/content/canvas/test/webgl/conformance/textures/texture-active-bind.html
@@ -39,8 +39,8 @@ function init()
   }
 
   description(
-      "Tests that glActiveTexture and glBindTexture work as expected" +
-      "Specifically texture targets are per active texture unit.");
+      "Tests that glActiveTexture and glBindTexture work as expected." +
+      " Specifically texture targets are per active texture unit.");
 
   var canvas2d = document.getElementById("canvas2d");
   var ctx2d = canvas2d.getContext("2d");
diff --git a/content/svg/content/test/matrixUtils.js b/content/svg/content/test/matrixUtils.js
index 5d4a5fbd3ab..0c69a507413 100644
--- a/content/svg/content/test/matrixUtils.js
+++ b/content/svg/content/test/matrixUtils.js
@@ -78,7 +78,7 @@ function cmpMatrix(a, b, msg)
      a.e == b.e &&
      a.f == b.f,
      msg + " - got " + formatMatrix(a)
-         + ", expected" + formatMatrix(b));
+         + ", expected " + formatMatrix(b));
 }
 
 function roughCmpMatrix(a, b, msg)
@@ -96,7 +96,7 @@ function roughCmpMatrix(a, b, msg)
      Math.abs(b.e - a.e) < tolerance &&
      Math.abs(b.f - a.f) < tolerance,
      msg + " - got " + formatMatrix(a)
-         + ", expected" + formatMatrix(b));
+         + ", expected " + formatMatrix(b));
 }
 
 function formatMatrix(m)
diff --git a/dom/plugins/test/mochitest/test_bug539565-1.html b/dom/plugins/test/mochitest/test_bug539565-1.html
index d769e081eec..69f26cc7d8c 100644
--- a/dom/plugins/test/mochitest/test_bug539565-1.html
+++ b/dom/plugins/test/mochitest/test_bug539565-1.html
@@ -48,10 +48,10 @@ function runTests() {
     netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
     var p = $("plugin1").getLastMouseX();
     const delta = 2;
-    ok(p-delta <= x && x <= p+delta, "test"+test+" LastMouseX got " + p + " expected" + x + 
+    ok(p-delta <= x && x <= p+delta, "test"+test+" LastMouseX got " + p + " expected " + x + 
                                      " with fullZoom="+viewer.fullZoom+" MozTransform='"+$("container").style.MozTransform+"'");
     p = $("plugin1").getLastMouseY();
-    ok(p-delta <= y && y <= p+delta, "test"+test+" LastMouseY got " + p + " expected" + y +
+    ok(p-delta <= y && y <= p+delta, "test"+test+" LastMouseY got " + p + " expected " + y +
                                      " with fullZoom="+viewer.fullZoom+" MozTransform='"+$("container").style.MozTransform+"'");
     if (next) next();
   }
diff --git a/dom/plugins/test/mochitest/test_bug539565-2.html b/dom/plugins/test/mochitest/test_bug539565-2.html
index acbf46b46e7..843309a5319 100644
--- a/dom/plugins/test/mochitest/test_bug539565-2.html
+++ b/dom/plugins/test/mochitest/test_bug539565-2.html
@@ -48,10 +48,10 @@ function runTests() {
     netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
     var p = $("plugin1").getLastMouseX();
     const delta = 2;
-    ok(p-delta <= x && x <= p+delta, "test"+test+" LastMouseX got " + p + " expected" + x + 
+    ok(p-delta <= x && x <= p+delta, "test"+test+" LastMouseX got " + p + " expected " + x + 
                                      " with fullZoom="+viewer.fullZoom+" MozTransform='"+$("container").style.MozTransform+"'");
     p = $("plugin1").getLastMouseY();
-    ok(p-delta <= y && y <= p+delta, "test"+test+" LastMouseY got " + p + " expected" + y +
+    ok(p-delta <= y && y <= p+delta, "test"+test+" LastMouseY got " + p + " expected " + y +
                                      " with fullZoom="+viewer.fullZoom+" MozTransform='"+$("container").style.MozTransform+"'");
     if (next) next();
   }