IntelliJ IDEA doesn't see type from .m2 jar

A Maven dependency is loaded, expected types are present in the jar in .m2, yet IntelliJ paints the import in red.

I tried deleting the dependency directory and loading it again, it didn't help.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>dbftest</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <repositories>
        <repository>
            <id>us_army</id>
            <url>https://www.hec.usace.army.mil/nexus/repository/maven-public/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.xBaseJ</groupId>
            <artifactId>xBaseJ</artifactId>
            <version>20140212</version>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.13.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

import org.junit.jupiter.api.Test;
import org.xBaseJ.DBF; // in red

public class XBaseJTest {

    @Test
    public void testCompilation() {}
}

Interestingly, mvn test-compile does not fail.

Why?