* Dependencies must be declared using a `String`, an instance of `Dependency`, a `FileCollection`, a `Provider` of `Dependency`, or a `ProviderConvertible` of `MinimalExternalModuleDependency`.
* Outside of Gradle build scripts, you must explicitly call a getter for the `DependencyCollector` and `add`.
** `dependencies.add("implementation", x)` becomes `getImplementation().add(x)`

public operator fun DependencyAdder.invoke(dependency: Provider<out Dependency>): Unit defined in org.gradle.kotlin.dsl
public operator fun DependencyAdder.invoke(externalModule: ProviderConvertible<out MinimalExternalModuleDependency>): Unit defined in org.gradle.kotlin.dsl
```

To fix this, replace the reference to `project` with a call to `project()`:

```kotlin
testing {
  suites {