Missing ch.logback.core.util.VersionUtil class on classpath. The version of logback-core is probably older than 1.5.26.

[zappee]

After upgradin my project to spring-boot-starter-parent 4.0.2 the following WARN appears in the log during executing Tests:

WARN in ch.qos.logback.classic.util.ContextInitializer@42e3ede4 - 
   Missing ch.logback.core.util.VersionUtil class on classpath. 
   The version of logback-core is probably older than 1.5.26.

mvn dependency:tree -Dscope=test -Dverbose

[INFO] +- org.springframework.boot:spring-boot-starter-aop:jar:3.5.10:provided
[INFO] |  +- org.springframework.boot:spring-boot-starter:jar:4.0.2:provided (version managed from 3.5.10)
[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:4.0.2:provided (version managed from 4.0.2)
[INFO] |  |  |  +- ***** ch.qos.logback:logback-classic:jar:1.5.31:  *****provided (version managed from 1.5.25)
[INFO] |  |  |  |  +- ***** ch.qos.logback:logback-core:jar:1.5.25 *****:provided (version managed from 1.5.31)
[INFO] |  |  |  |  \- (org.slf4j:slf4j-api:jar:2.0.17:provided - version managed from 2.0.17; omitted for duplicate)
[INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.25.3:provided (version managed from 2.25.3)
[INFO] |  |  |  |  +- org.apache.logging.log4j:log4j-api:jar:2.25.3:provided (version managed from 2.25.3)
[INFO] |  |  |  |  \- (org.slf4j:slf4j-api:jar:2.0.17:provided - version managed from 2.0.17; omitted for duplicate)
[INFO] |  |  |  \- org.slf4j:jul-to-slf4j:jar:2.0.17:provided (version managed from 2.0.17)
[INFO] |  |  |     \- (org.slf4j:slf4j-api:jar:2.0.17:provided - version managed from 2.0.17; omitted for duplicate)

[philwebb]

Something looks wrong with your dependencies. Why is org.springframework.boot:spring-boot-starter-aop:jar pulling in 3.5.10? Can you please share a complete project that replicates the problem.