diff --git a/src/main/scala/com/lectra/kapoeira/glue/FeaturesStepDefinitions.scala b/src/main/scala/com/lectra/kapoeira/glue/FeaturesStepDefinitions.scala
index ec22074..3a019be 100644
--- a/src/main/scala/com/lectra/kapoeira/glue/FeaturesStepDefinitions.scala
+++ b/src/main/scala/com/lectra/kapoeira/glue/FeaturesStepDefinitions.scala
@@ -226,7 +226,7 @@ class FeaturesStepDefinitions
       )
   }
 
-  And("^assert\\s+(\\S+)\\s+(\\$\\S*)\\s*==\\s+(\\d+\\.\\d+)\\s+\\+\\-\\s+(\\d+\\.\\d+)\\s*$") {
+  And("""^assert\s+(\S+)\s+(\$\S*)\s*==\s+([+-]?(?=\.\d|\d)(?:\d+)?(?:\.?\d*)(?:[eE][+-]?\d+)?)\s+\+\-\s+([+-]?(?=\.\d|\d)(?:\d+)?(?:\.?\d*)(?:[eE][+-]?\d+)?)\s*$""") {
     (alias: String, jsonExpression: String, expectedJsonNumber: String,approximationJsonNumber:String) =>
       val interpolatedExpectedJson =
         backgroundContext.substituteVariablesIn(expectedJsonNumber)
diff --git a/src/test/resources/features/assertions.feature b/src/test/resources/features/assertions.feature
index b4c59bc..870fc3b 100644
--- a/src/test/resources/features/assertions.feature
+++ b/src/test/resources/features/assertions.feature
@@ -25,6 +25,8 @@ Feature: assertions
     And assert value2.2 $ == [3,4]
     And assert value2.3 $ == "value2.3"
     And assert value2.4 $.foo == 12.0038209653823934567890123456789
-    And assert value2.4 $.foo == 12.0038 +- 0.1
+    And assert value2.4 $.foo == 12.0 +- 0.1
+    And assert value2.4 $.foo == 12.1 +- 0.1
+    And assert value2.4 $.foo == 12.0038 +- 1E4
     And assert aliasHeaders2.1 $ == {"foo":"bar","baz":"42"}
     And assert aliasHeaders2.1 $.foo == "bar"
diff --git a/src/test/scala/com/lectra/kapoeira/glue/AssertsTest.scala b/src/test/scala/com/lectra/kapoeira/glue/AssertsTest.scala
index 4d89bdd..a9be2f9 100644
--- a/src/test/scala/com/lectra/kapoeira/glue/AssertsTest.scala
+++ b/src/test/scala/com/lectra/kapoeira/glue/AssertsTest.scala
@@ -47,7 +47,10 @@ class AssertsTest extends AnyFlatSpec with Matchers with MockFactory {
     val expectedConsumedRecords = List(keyValueRecord)
     assertionContext.launchConsumption(expectedConsumedRecords)
 
-    Asserts.approxEqual(assertionContext, valueAlias, "$.foo", "12.0038","0.1" )
+    Asserts.approxEqual(assertionContext, valueAlias, "$.foo", "12.0038","0.0001" )
+    Asserts.approxEqual(assertionContext, valueAlias, "$.foo", "12.0038","1E4" )
+    Asserts.approxEqual(assertionContext, valueAlias, "$.foo", "12.0","0.1" )
+    Asserts.approxEqual(assertionContext, valueAlias, "$.foo", "12.1","0.1" )
 
   }