diff --git a/installsystems/config.py b/installsystems/config.py
index b5194040c5328b0c9f247b1940f4ce058149d37c..a2430942225769786a30e011d8d828d909c36780 100644
--- a/installsystems/config.py
+++ b/installsystems/config.py
@@ -32,7 +32,7 @@ from installsystems.repository import RepositoryConfig
 
 # This must not be an unicode string, because configobj don't decode configspec
 # with the provided encoding
-MAIN_CONFIG_SPEC = """\
+MAIN_CONFIG_SPEC = '''\
 [installsystems]
 verbosity = integer(0, 2)
 repo_config = string
@@ -48,11 +48,11 @@ no_color = boolean
 nice = integer
 ionice_class = option("none", "rt", "be", "idle")
 ionice_level = integer
-"""
+'''
 
 # This must not be an unicode string, because configobj don't decode configspec
 # with the provided encoding
-REPO_CONFIG_SPEC = """\
+REPO_CONFIG_SPEC = '''\
 [__many__]
     path = string
     fmod = string
@@ -62,7 +62,7 @@ REPO_CONFIG_SPEC = """\
     offline = boolean
     lastpath = string
     dbpath = string
-"""
+'''
 
 
 class ConfigFile(object):
diff --git a/installsystems/image.py b/installsystems/image.py
index 722b5604679e310ace16ceb555a75eccc6334bac..b3bbdf651c89c14fa3f52cd12ff189bf46aed334 100644
--- a/installsystems/image.py
+++ b/installsystems/image.py
@@ -50,7 +50,7 @@ from installsystems.tarball import Tarball
 
 # This must not be an unicode string, because configobj don't decode configspec
 # with the provided encoding
-DESCRIPTION_CONFIG_SPEC = """\
+DESCRIPTION_CONFIG_SPEC = '''\
 [image]
 name = IS_name
 version = IS_version
@@ -60,7 +60,7 @@ is_min_version = IS_min_version
 
 [compressor]
 __many__ = force_list
-"""
+'''
 
 
 class Image(object):