You should really speed up these slow tests (>50ms)...
1. 1417ms to run DatabaseSqliteTest:testUpgrades
2. 725ms to run ApiQueryContinueTest:testSameGenList
3. 681ms to run ApiQueryUserContribsTest:testSorting with data set "All users, "
4. 679ms to run ApiQueryUserContribsTest:testSorting with data set "All users, , reverse"
5. 648ms to run ApiQueryContinueTest:testGen2Prop
6. 618ms to run ApiQueryContinueTest:testGen2Prop2List1Meta
7. 576ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Template with explicit namespace in language variants"
8. 571ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: percent-encoding and + signs in internal links (T28410)"
9. 553ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testXmlDumpsBackupUseCase with data set #1
10. 541ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: HTML Hex character encoding bogus encoding (T28437 regression check)"
11. 540ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testFullStubPlain with data set #1
12. 538ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Tables: 2a. Nested in td"
13. 536ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: File in link scenarios"
14. 530ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Section wrapping with editable lead section + div overlapping multiple sections"
15. 524ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Templates inside raw output of variant escape tags (R flag)"
16. 520ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Self-closed tag with broken attribute value quoting"
17. 519ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Strip marker in formatNum"
18. 516ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Internal link with kaa linktrail with apostrophes (T29473)"
19. 515ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Parsoid: DOM fragment reuse"
20. 513ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Single-line or multiline-comments can follow headings"
21. 511ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Transclusion of a child page"
22. 510ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Special:Search page linking."
23. 507ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testXmlDumpsBackupUseCase with data set #0
24. 505ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testFullTextPlain with data set #0
25. 503ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Templates: Ugly templates: 4. newline-only template parameter inconsistency"
26. 503ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Fuzz testing: Parser16"
27. 497ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testFullStubPlain with data set #0
28. 493ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Template parameter as link source"
29. 492ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: T2529: Uncovered bullet in parser function result"
30. 489ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Preprocessor precedence 18: another rightmost wins scenario"
31. 489ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Templates: HTML Tag: 9. Multiple template-generated attributes"
32. 487ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testCurrentStubPlain with data set #0
33. 480ms to run ApiQueryRecentChangesIntegrationTest:testExternalTypeParameters
34. 472ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testFullTextPlain with data set #1
35. 469ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Interlanguage link with spacing"
36. 464ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Nesting of <ruby>"
37. 463ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: formatdate parser function, with default format and on a page of which the content language is always English and different from the wiki content language"
38. 461ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: 1. Generate correct wikitext for tables with thead/tbody/tfoot"
39. 461ms to run ApiQueryRecentChangesIntegrationTest:testFlagsPropParameter
40. 455ms to run MediaWiki\Tests\Maintenance\BackupDumperPageTest:testCurrentStubPlain with data set #1
41. 454ms to run ApiQueryWatchlistIntegrationTest:testExcludeUserParam
42. 452ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Image: bitmap frameless can't be enlarged past original size, but vector can"
43. 450ms to run ApiQueryContinueTest:testSameGenAndProp
44. 448ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Manually-specified thumbnail image with explicit no link"
45. 445ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Nested template calls"
46. 445ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: Image: caption containing a table"
47. 444ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: 2. Categories and newlines: All preceding newlines should be suppressed (courtesy T2087)"
48. 441ms to run ApiEditPageTest:testUndoWithConflicts
49. 441ms to run ParserIntegrationTest:testParse with data set "parserTests.txt: T4304: HTML attribute safety (PMID)"
50. 439ms to run ApiQueryRecentChangesIntegrationTest:testLoginfoPropParameter
...and there are 456 more above your threshold hidden from view