diff --git a/packages/squiggle-lang/__tests__/SquiggleLibrary/SquiggleLibrary_FunctionRegistryLibrary_test.res b/packages/squiggle-lang/__tests__/SquiggleLibrary/SquiggleLibrary_FunctionRegistryLibrary_test.res
index a3b73d2b..77052d9b 100644
--- a/packages/squiggle-lang/__tests__/SquiggleLibrary/SquiggleLibrary_FunctionRegistryLibrary_test.res
+++ b/packages/squiggle-lang/__tests__/SquiggleLibrary/SquiggleLibrary_FunctionRegistryLibrary_test.res
@@ -1,5 +1,6 @@
 open Jest
 open Expect
+open Reducer_TestHelpers
 
 let expectEvalToBeOk = (expr: string) =>
   Reducer.evaluate(expr)->Reducer_Helpers.rRemoveDefaultsExternal->E.R.isOk->expect->toBe(true)
@@ -29,3 +30,49 @@ describe("Fn auto-testing", () => {
     },
   )
 })
+
+describe("FunctionRegistry Library", () => {
+  testEvalToBe("List.make(3, 'HI')", "Ok(['HI','HI','HI'])")
+  testEvalToBe("make(3, 'HI')", "Error(Function not found: make(Number,String))")
+  testEvalToBe("List.upTo(1,3)", "Ok([1,2,3])")
+  testEvalToBe("List.first([3,5,8])", "Ok(3)")
+  testEvalToBe("List.last([3,5,8])", "Ok(8)")
+  testEvalToBe("List.reverse([3,5,8])", "Ok([8,5,3])")
+  testEvalToBe("Dist.normal(5,2)", "Ok(Normal(5,2))")
+  testEvalToBe("normal(5,2)", "Ok(Normal(5,2))")
+  testEvalToBe("normal({mean:5,stdev:2})", "Ok(Normal(5,2))")
+  testEvalToBe("-2 to 4", "Ok(Normal(1,1.8238704957353074))")
+  testEvalToBe("pointMass(5)", "Ok(PointMass(5))")
+  testEvalToBe("Number.floor(5.5)", "Ok(5)")
+  testEvalToBe("Number.ceil(5.5)", "Ok(6)")
+  testEvalToBe("floor(5.5)", "Ok(5)")
+  testEvalToBe("ceil(5.5)", "Ok(6)")
+  testEvalToBe("Number.abs(5.5)", "Ok(5.5)")
+  testEvalToBe("abs(5.5)", "Ok(5.5)")
+  testEvalToBe("Number.exp(10)", "Ok(22026.465794806718)")
+  testEvalToBe("Number.log10(10)", "Ok(1)")
+  testEvalToBe("Number.log2(10)", "Ok(3.321928094887362)")
+  testEvalToBe("Number.sum([2,5,3])", "Ok(10)")
+  testEvalToBe("sum([2,5,3])", "Ok(10)")
+  testEvalToBe("Number.product([2,5,3])", "Ok(30)")
+  testEvalToBe("Number.min([2,5,3])", "Ok(2)")
+  testEvalToBe("Number.max([2,5,3])", "Ok(5)")
+  testEvalToBe("Number.mean([0,5,10])", "Ok(5)")
+  testEvalToBe("Number.geomean([1,5,18])", "Ok(4.481404746557164)")
+  testEvalToBe("Number.stdev([0,5,10,15])", "Ok(5.5901699437494745)")
+  testEvalToBe("Number.variance([0,5,10,15])", "Ok(31.25)")
+  testEvalToBe("Number.sort([10,0,15,5])", "Ok([0,5,10,15])")
+  testEvalToBe("Number.cumsum([1,5,3])", "Ok([1,6,9])")
+  testEvalToBe("Number.cumprod([1,5,3])", "Ok([1,5,15])")
+  testEvalToBe("Number.diff([1,5,3])", "Ok([4,-2])")
+  testEvalToBe(
+    "Dist.logScore({estimate: normal(5,2), answer: normal(5.2,1), prior: normal(5.5,3)})",
+    "Ok(-0.33591375663884876)",
+  )
+  testEvalToBe(
+    "Dist.logScore({estimate: normal(5,2), answer: normal(5.2,1)})",
+    "Ok(0.32244107041564646)",
+  )
+  testEvalToBe("Dist.logScore({estimate: normal(5,2), answer: 4.5})", "Ok(1.6433360626394853)")
+  testEvalToBe("Dist.klDivergence(normal(5,2), normal(5,1.5))", "Ok(0.06874342818671068)")
+})
diff --git a/packages/squiggle-lang/package.json b/packages/squiggle-lang/package.json
index ba6449ce..b2067205 100644
--- a/packages/squiggle-lang/package.json
+++ b/packages/squiggle-lang/package.json
@@ -15,7 +15,6 @@
     "start": "rescript build -w -with-deps",
     "clean": "rescript clean && rm -rf dist",
     "test:reducer": "jest __tests__/Reducer*/",
-    "test:reducer2": "jest __tests__/FunctionRegistry_test",
     "benchmark": "ts-node benchmark/conversion_tests.ts",
     "test": "jest",
     "test:ts": "jest __tests__/TS/",
diff --git a/packages/squiggle-lang/src/rescript/FunctionRegistry/Library/FR_Number.res b/packages/squiggle-lang/src/rescript/FunctionRegistry/Library/FR_Number.res
index 6bf9ff9e..c7027f06 100644
--- a/packages/squiggle-lang/src/rescript/FunctionRegistry/Library/FR_Number.res
+++ b/packages/squiggle-lang/src/rescript/FunctionRegistry/Library/FR_Number.res
@@ -192,7 +192,7 @@ let library = [
     ~output=EvtNumber,
     ~examples=[`variance([3,5,2,3,5])`],
     ~definitions=[
-      ArrayNumberDist.make("variance", r => r->E.A.Floats.stdev->Wrappers.evNumber->Ok),
+      ArrayNumberDist.make("variance", r => r->E.A.Floats.variance->Wrappers.evNumber->Ok),
     ],
     (),
   ),
@@ -217,7 +217,7 @@ let library = [
     ~examples=[`cumsum([3,5,2,3,5])`],
     ~definitions=[
       ArrayNumberDist.make("cumsum", r =>
-        r->E.A.Floats.cumsum->E.A2.fmap(Wrappers.evNumber)->Wrappers.evArray->Ok
+        r->E.A.Floats.cumSum->E.A2.fmap(Wrappers.evNumber)->Wrappers.evArray->Ok
       ),
     ],
     (),
@@ -230,7 +230,7 @@ let library = [
     ~examples=[`cumprod([3,5,2,3,5])`],
     ~definitions=[
       ArrayNumberDist.make("cumprod", r =>
-        r->E.A.Floats.cumsum->E.A2.fmap(Wrappers.evNumber)->Wrappers.evArray->Ok
+        r->E.A.Floats.cumProd->E.A2.fmap(Wrappers.evNumber)->Wrappers.evArray->Ok
       ),
     ],
     (),
diff --git a/packages/squiggle-lang/src/rescript/Utility/E.res b/packages/squiggle-lang/src/rescript/Utility/E.res
index fd328a1c..eba85545 100644
--- a/packages/squiggle-lang/src/rescript/Utility/E.res
+++ b/packages/squiggle-lang/src/rescript/Utility/E.res
@@ -752,7 +752,7 @@ module A = {
     let diff = (t: t): array<float> =>
       Belt.Array.zipBy(t, Belt.Array.sliceToEnd(t, 1), (left, right) => right -. left)
 
-    let cumsum = (t: t): array<float> => accumulate((a, b) => a +. b, t)
+    let cumSum = (t: t): array<float> => accumulate((a, b) => a +. b, t)
     let cumProd = (t: t): array<float> => accumulate((a, b) => a *. b, t)
 
     exception RangeError(string)