diff --git a/tests/backend/specs/easysync/other.js b/tests/backend/specs/easysync/other.js
index 25ac0f090..8d95ec965 100644
--- a/tests/backend/specs/easysync/other.js
+++ b/tests/backend/specs/easysync/other.js
@@ -95,6 +95,9 @@ describe("other",function(){
 
 
   // throughIterator is not used
+  /**
+   * @param opsStr
+   */
   function throughIterator(opsStr) {
     var iter = Changeset.opIterator(opsStr);
     var assem = Changeset.opAssembler();
@@ -105,6 +108,9 @@ describe("other",function(){
   }
 
   // throughSmartAssembler is not used
+  /**
+   * @param opsStr
+   */
   function throughSmartAssembler(opsStr) {
     var iter = Changeset.opIterator(opsStr);
     var assem = Changeset.smartOpAssembler();
@@ -119,6 +125,12 @@ describe("other",function(){
 
 
 
+  /**
+   * @param testId
+   * @param cs
+   * @param lines
+   * @param correctLines
+   */
   function testMutateTextLines(testId, cs, lines, correctLines) {
 
     var a = lines.slice();
@@ -126,6 +138,14 @@ describe("other",function(){
     assertEqualArrays(correctLines, a);
   }
 
+  /**
+   * @param testId
+   * @param cs
+   * @param lines
+   * @param alines
+   * @param pool
+   * @param correctOutput
+   */
   function testInverse(testId, cs, lines, alines, pool, correctOutput) {
 
     pool = poolOrArray(pool);
@@ -133,12 +153,25 @@ describe("other",function(){
     assertEqualStrings(correctOutput, str);
   }
 
+  /**
+   * @param testId
+   * @param cs
+   * @param filter
+   * @param correctOutput
+   */
   function testFilterAttribNumbers(testId, cs, filter, correctOutput) {
 
     var str = Changeset.filterAttribNumbers(cs, filter);
     assertEqualStrings(correctOutput, str);
   }
 
+  /**
+   * @param testId
+   * @param attribs
+   * @param cs
+   * @param inAttr
+   * @param outCorrect
+   */
   function runApplyToAttributionTest(testId, attribs, cs, inAttr, outCorrect) {
     var p = poolOrArray(attribs);
     var result = Changeset.applyToAttribution(
diff --git a/tests/backend/specs/easysync/textlinemutations.js b/tests/backend/specs/easysync/textlinemutations.js
index bb6aacd7c..08e9126b5 100644
--- a/tests/backend/specs/easysync/textlinemutations.js
+++ b/tests/backend/specs/easysync/textlinemutations.js
@@ -223,6 +223,10 @@ describe("textLinesMutator",function(){
   });
 });
 
+/**
+ * @param origLines
+ * @param muts
+ */
 function runMutationTest(origLines, muts) {
   var lines1 = origLines.slice();
   var mu = Changeset.textLinesMutator(lines1);
@@ -238,6 +242,10 @@ function runMutationTest(origLines, muts) {
   return [lines1,lines2,outText];
 }
 
+/**
+ * @param mu
+ * @param arrayOfArrays
+ */
 function applyMutations(mu, arrayOfArrays) {
   arrayOfArrays.forEach(function (a) {
     var result = mu[a[0]].apply(mu, a.slice(1));
@@ -247,6 +255,10 @@ function applyMutations(mu, arrayOfArrays) {
   });
 }
 
+/**
+ * @param oldLen
+ * @param arrayOfArrays
+ */
 function mutationsToChangeset(oldLen, arrayOfArrays) {
   var assem = Changeset.smartOpAssembler();
   var op = Changeset.newOp();