14 files changed, 24 insertions, 3 deletions
diff --git a/tests/array/tarray.nim b/tests/array/tarray.nim
index 96e90c97a..2a371b788 100644
--- a/tests/array/tarray.nim
+++ b/tests/array/tarray.nim
@@ -28,6 +28,7 @@ dflfdjkl__abcdefgasfsgdfgsgdfggsdfasdfsafewfkljdsfajsdf
 kgdchlfniambejop
 fjpmholcibdgeakn
 '''
+joinable: false
 """
 
 block tarray:
diff --git a/tests/collections/ttables.nim b/tests/collections/ttables.nim
index b22b2b237..6798e5731 100644
--- a/tests/collections/ttables.nim
+++ b/tests/collections/ttables.nim
@@ -6,10 +6,11 @@ And we get here
 2
 3
 '''
+joinable: false
 """
 import hashes, sequtils, tables
 
-
+# test should not be joined because it takes too long.
 block tableadds:
   proc main =
     var tab = newTable[string, string]()
diff --git a/tests/destructor/turn_destroy_into_finalizer.nim b/tests/destructor/turn_destroy_into_finalizer.nim
index b3f34003e..1409c1c57 100644
--- a/tests/destructor/turn_destroy_into_finalizer.nim
+++ b/tests/destructor/turn_destroy_into_finalizer.nim
@@ -1,5 +1,6 @@
 discard """
   output: "turn_destroy_into_finalizer works"
+  joinable: false
 """
 
 type
diff --git a/tests/generics/trtree.nim b/tests/generics/trtree.nim
index 3fb080335..6ec1c8f6f 100644
--- a/tests/generics/trtree.nim
+++ b/tests/generics/trtree.nim
@@ -2,8 +2,11 @@ discard """
   output: '''1 [2, 3, 4, 7]
 [0, 0]'''
   target: "c"
+  joinable: false
 """
 
+# don't join because the code is too messy.
+
 # Nim RTree and R*Tree implementation
 # S. Salewski, 06-JAN-2018
 
diff --git a/tests/method/tmultim.nim b/tests/method/tmultim.nim
index 310502c56..0e68b660f 100644
--- a/tests/method/tmultim.nim
+++ b/tests/method/tmultim.nim
@@ -4,9 +4,10 @@ collide: unit, thing
 collide: unit, thing
 collide: thing, unit
 collide: thing, thing
-collide: unit, thing | collide: unit, thing | collide: thing, unit | 
+collide: unit, thing | collide: unit, thing | collide: thing, unit |
 do nothing
 '''
+  joinable: false
 """
 
 
diff --git a/tests/misc/tcmdline.nim b/tests/misc/tcmdline.nim
index 2c4768716..71e1301ca 100644
--- a/tests/misc/tcmdline.nim
+++ b/tests/misc/tcmdline.nim
@@ -1,5 +1,6 @@
 discard """
 outputsub: "Number of parameters: 0"
+joinable: false
 """
 # Test the command line
 
diff --git a/tests/misc/tnew.nim b/tests/misc/tnew.nim
index 02282dd4a..2d9a64461 100644
--- a/tests/misc/tnew.nim
+++ b/tests/misc/tnew.nim
@@ -3,6 +3,7 @@ outputsub: '''
 Simple tree node allocation worked!
 Simple cycle allocation worked!
 '''
+joinable: false
 """
 
 # Test the implementation of the new operator
diff --git a/tests/pragmas/tused.nim b/tests/pragmas/tused.nim
index dce854146..67a039d8a 100644
--- a/tests/pragmas/tused.nim
+++ b/tests/pragmas/tused.nim
@@ -4,8 +4,10 @@ compile start
 tused.nim(15, 8) Hint: 'tused.echoSub(a: int, b: int)[declared in tused.nim(15, 7)]' is declared but not used [XDeclaredButNotUsed]
 compile end'''
   output: "8\n8"
+  joinable: false
 """
 
+# not joinable because paths in nimout differ when imported
 static:
   echo "compile start"
 
diff --git a/tests/stdlib/tquit.nim b/tests/stdlib/tquit.nim
index 4f8d5fb20..1f9283ec4 100644
--- a/tests/stdlib/tquit.nim
+++ b/tests/stdlib/tquit.nim
@@ -2,6 +2,7 @@ discard """
 output: '''
 just exiting...
 '''
+joinable: false
 """
 
 # Test the new beforeQuit variable:
diff --git a/tests/system/t7894.nim b/tests/system/t7894.nim
index 27ee3f220..b7ca1eec8 100644
--- a/tests/system/t7894.nim
+++ b/tests/system/t7894.nim
@@ -1,6 +1,7 @@
 discard """
 disabled: "travis"
 disabled: "appveyor"
+joinable: false
 """
 
 # CI integration servers are out of memory for this test
diff --git a/tests/system/talloc2.nim b/tests/system/talloc2.nim
index e40c3f93c..7e0dec9d3 100644
--- a/tests/system/talloc2.nim
+++ b/tests/system/talloc2.nim
@@ -1,5 +1,6 @@
 discard """
 disabled: "windows"
+joinable: false
 """
 
 # appveyor is "out of memory"
diff --git a/tests/system/tparams.nim b/tests/system/tparams.nim
index 015530043..dcd620b20 100644
--- a/tests/system/tparams.nim
+++ b/tests/system/tparams.nim
@@ -1,3 +1,8 @@
+discard """
+joinable: false
+"""
+
+# not joinable because it executes itself with parameters
 import os
 import osproc
 import parseopt2
diff --git a/tests/system/trealloc.nim b/tests/system/trealloc.nim
index dc5f712d6..7180b8eda 100644
--- a/tests/system/trealloc.nim
+++ b/tests/system/trealloc.nim
@@ -1,5 +1,6 @@
 discard """
   output: '''success'''
+  joinable: false
 """
 
 # bug #4818
diff --git a/tests/types/tissues_types.nim b/tests/types/tissues_types.nim
index 97c796302..d3643842e 100644
--- a/tests/types/tissues_types.nim
+++ b/tests/types/tissues_types.nim
@@ -9,8 +9,9 @@ ptr Foo
 (member: "hello world", x: ...)
 (member: 123.456, x: ...)
 '''
+joinable: false
 """
-
+# not joinable because it causes out of memory with --gc:boehm
 import typetraits
 
 block t1252: