diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index 347a5a1..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,12 +0,0 @@
-FROM ubuntu:latest
-
-ARG DEBIAN_FRONTEND=noninteractive
-
-RUN apt-get update && apt-get -y install apt-utils adduser sudo
-
-RUN useradd -m testuser && echo "testuser:testuserpw" | chpasswd && adduser testuser sudo
-RUN echo "testuser ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/testuser
-
-USER testuser
-CMD /bin/bash
-WORKDIR /home/testuser
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt
index 208ea36..94c69a2 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/docker/dockerimages/DockerImages.kt
@@ -17,7 +17,7 @@ class UbuntuPlusUser(private val userName: String = "testuser") : DockerImage {
 
     override fun imageText(): String {
         return """
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 ARG DEBIAN_FRONTEND=noninteractive
 
diff --git a/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt b/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt
index 3c0af1e..0ce8d9c 100644
--- a/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt
+++ b/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/platformTest/UbuntuProvTest.kt
@@ -103,7 +103,8 @@ internal class UbuntuProvTest {
 
         // then
         assertFalse(result.success)
-        assertEquals("sudo: no tty present and no askpass program specified\n", result.err)
+        val expectedMsg = "a password is required"
+        assertTrue(result.err?.contains(expectedMsg) ?: false, "Error: [$expectedMsg] is not found in [${result.err}]")
     }
 
 }
@@ -119,7 +120,7 @@ class UbuntuUserNeedsPasswordForSudo(private val userName: String = "testuser")
 
     override fun imageText(): String {
         return """
-FROM ubuntu:18.04
+FROM ubuntu:22.04
 
 ARG DEBIAN_FRONTEND=noninteractive