diff --git a/tests/FsSpreadsheet.Tests/FsCell.fs b/tests/FsSpreadsheet.Tests/FsCell.fs
index ed1078b0..9e849a5e 100644
--- a/tests/FsSpreadsheet.Tests/FsCell.fs
+++ b/tests/FsSpreadsheet.Tests/FsCell.fs
@@ -7,14 +7,74 @@ open FsSpreadsheet
 [<Tests>]
 let dataTypeTests =
     testList "DataType" [
-        testCase "InferCellValue bool = true" <| fun _ ->
+        testList "InferCellValue bool = true" [
             let boolValTrue = true
-            let resultDt, resultStr = DataType.InferCellValue boolValTrue
-            Expect.isTrue (resultDt = DataType.Boolean) "is not expected bool"
-            Expect.isTrue (resultStr = "True") "resulting string is not correct"
-        testCase "InferCellValue bool = false" <| fun _ ->
+            let resultDtTrue, resultStrTrue = DataType.InferCellValue boolValTrue
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTrue = DataType.Boolean) "is not the expected DataType.Boolean"
+            testCase "Correct string" <| fun _ ->
+                Expect.isTrue (resultStrTrue = "True") "resulting string is not correct"
+        ]
+        testList "InferCellValue bool = false" [
             let boolValFalse = false
-            let resultDt, resultStr = DataType.InferCellValue boolValFalse
-            Expect.isTrue (resultDt = DataType.Boolean) "is not expected bool"
-            Expect.isTrue (resultStr = "False") "resulting string is not correct"
+            let resultDtFalse, resultStrFalse = DataType.InferCellValue boolValFalse
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtFalse = DataType.Boolean) "is not the expected DataType.Boolean"
+            testCase "Correct string" <| fun _ ->
+                Expect.isTrue (resultStrFalse = "False") "resulting string is not correct"
+        ]
+        testList "InferCellValue string = \"test\"" [
+            let stringValTest = "test"
+            let resultDtTest, resultStrTest = DataType.InferCellValue stringValTest
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTest = DataType.String) "is not the expected DataType.String"
+            testCase "Correct string" <| fun _ ->
+                Expect.isTrue (resultStrTest = "test") "resulting string is not correct"
+        ]
+        testList "InferCellValue string = \"\"" [
+            let stringValTest = ""
+            let resultDtTest, resultStrTest = DataType.InferCellValue stringValTest
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTest = DataType.String) "is not the expected DataType.String"
+            testCase "Correct string" <| fun _ ->
+                Expect.isTrue (resultStrTest = "") "resulting string is not correct"
+        ]
+        testList "InferCellValue char = 1" [
+            let charValTest = '1'
+            let resultDtTest, resultChrTest = DataType.InferCellValue charValTest
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTest = DataType.String) "is not the expected DataType.String"
+            testCase "Correct string" <| fun _ ->
+                Expect.isTrue (resultChrTest = "1") "resulting string is not correct"
+        ]
+        testList "InferCellValue byte = 255uy" [
+            let byteValTest = 255uy
+            let resultDtTest, resultBytTest = DataType.InferCellValue byteValTest
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTest = DataType.Number) "is not the expected DataType.Number"
+            testCase "Correct string" <| fun _ ->
+                Expect.equal "255" resultBytTest "resulting string is not correct"
+        ]
+        testList "InferCellValue sbyte = -10y" [
+            let sbyteValTest = -10y
+            let resultDtTest, resultSbyTest = DataType.InferCellValue sbyteValTest
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTest = DataType.Number) "is not the expected DataType.Number"
+            testCase "Correct string" <| fun _ ->
+                Expect.equal "-10" resultSbyTest "resulting string is not correct"
+        ]
+        testList "InferCellValue int = 0" [
+            let intValTest = 0
+            let resultDtTest, resultIntTest = DataType.InferCellValue intValTest
+            testCase "Correct DataType" <| fun _ ->
+                Expect.isTrue (resultDtTest = DataType.Number) "is not the expected DataType.Number"
+            testCase "Correct string" <| fun _ ->
+                Expect.equal "0" resultIntTest "resulting string is not correct"
+        ]
+    ]
+
+[<Tests>]
+let fsCellTest =
+    testList "Constructors" [
+        
     ]
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