Hi, thanks for the quick response. Below is as much information as I can 
give for the moment, if more is needed just ask.
I have also searched everywhere for information about this (and similar 
problems which are now resolved)

> Task :app:connectedDevelopmentDebugAndroidTest
Starting 0 tests on SM-G970F - 10
Tests on SM-G970F - 10 failed: Instrumentation run failed due to 'Process 
crashed.'

com.android.build.gradle.internal.testing.ConnectedDevice > No tests 
found.[SM-G970F - 10] FAILED 
No tests found. This usually means that your test classes are not in the 
form that your test runner expects (e.g. don't inherit from TestCase or 
lack @Test annotations).

> Task :app:connectedDevelopmentDebugAndroidTest FAILED

This is the output when bumping the version up. Everything works fine when 
the version is 0.8.4 or less.
In case this helps, here is my system setup:
Windows 10
Java 15 (tried with Java 12 & Java 8 too)
Gradle 6.7 (Tried with 6.6, 6.5 & 6.3)

In case this helps too, here are parts of my project setup (unfortunately I 
can't share everything). It is a single module with different flavors
compileSdkVersion 30
buildToolsVersion "30.0.0" 
...
buildTypes {
    debug {
        testCoverageEnabled true
    }
}
...
androidTestImplementation "androidx.test.espresso:espresso-core:3.3.0"
androidTestImplementation "androidx.test.espresso:espresso-contrib:3.3.0"
androidTestImplementation 'androidx.test.espresso:espresso-intents:3.3.0'
androidTestImplementation 'androidx.test.espresso:espresso-web:3.3.0'
androidTestImplementation "androidx.test.ext:junit:1.1.2"
androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
androidTestImplementation 'androidx.test:runner:1.3.0'
androidTestImplementation 'com.squareup.okhttp3:mockwebserver:4.9.0'

As said my tests run fine without Jacoco or on a lower version so it is 
definitely related (just may not be the cause) however I have tried a lot 
of different things like changing the java version or gradle and even 
frameworks within my test code (turns out I was actually using legacy 
libraries) but as far as I can see everything is up to date and I tend to 
stick to either googles or androids documentation when developing.
On Thursday, November 26, 2020 at 4:47:47 PM UTC+1 Marc R. Hoffmann wrote:

> Is there any log output or error messages on the console? 
>
> On 26. Nov 2020, at 13:46, LethalMaus <descripti...@gmail.com> wrote:
>
> Hi, when I bump up my jacoco version from 0.8.4 to either 0.8.5 or 0.8.6, 
> my tests fail to run and it claims to find 'no tests'. Has anyone else 
> experienced this before? 
>
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