diff --git a/src/main/java/net/kemitix/text/fit/BoxFitterImpl.java b/src/main/java/net/kemitix/text/fit/BoxFitterImpl.java
index 2606b8d..edc09e4 100644
--- a/src/main/java/net/kemitix/text/fit/BoxFitterImpl.java
+++ b/src/main/java/net/kemitix/text/fit/BoxFitterImpl.java
@@ -44,7 +44,7 @@ class BoxFitterImpl implements BoxFitter {
                 new FitEnvironment(text, fontFactory, graphics2D,
                         boxes));
         if (fit <= 2) {
-            throw new IllegalArgumentException("The text is too long to fit");
+            throw new NotEnoughSpace(0);
         }
         return fit;
     }
diff --git a/src/test/java/net/kemitix/text/fit/BoxFitterTest.java b/src/test/java/net/kemitix/text/fit/BoxFitterTest.java
index 5f39e9a..0db6b55 100644
--- a/src/test/java/net/kemitix/text/fit/BoxFitterTest.java
+++ b/src/test/java/net/kemitix/text/fit/BoxFitterTest.java
@@ -89,11 +89,11 @@ public class BoxFitterTest
         }
 
         @Test
-        @DisplayName("Text too long to fit throws and exception")
+        @DisplayName("Text too long to fit throws")
         // too long to fit means it would need to be rendered at a font size of <2
         public void tooLongThrows() {
             String longText = longStringGenerator(197);
-            assertThatExceptionOfType(IllegalArgumentException.class)
+            assertThatExceptionOfType(NotEnoughSpace.class)
                     .isThrownBy(() -> fit(longText));
         }