diff --git a/test/MockToolset.py b/test/MockToolset.py
index e95132e17d..c4af9650b6 100755
--- a/test/MockToolset.py
+++ b/test/MockToolset.py
@@ -195,7 +195,7 @@ def adjust_path(p):
 import common ;
 import type ;
 
-.python-cmd = "\"%s\"" ;
+.python-cmd = "%s" ;
 
 # Behave the same as gcc on Windows, because that's what
 # the test system expects
@@ -206,7 +206,7 @@ def adjust_path(p):
 {
     local here = [ path.make [ modules.binding $(__name__) ] ] ;
     here = [ path.native [ path.root [ path.parent $(here) ] [ path.pwd ] ] ] ;
-    .config-cmd = [ common.variable-setting-command JAM_CWD : $(here) ] $(.python-cmd) -B ;
+    .config-cmd = [ common.variable-setting-command JAM_CWD : $(here) ] "\\"$(.python-cmd:J= )\\"" -B ;
 }
 
 feature.extend toolset : mock ;
@@ -253,7 +253,7 @@ def adjust_path(p):
     $(.config-cmd) mock.py --dll "$(>)" -o "$(<)" $(USER_OPTIONS) -L"$(LINK_PATH)" --static-lib=$(FINDLIBS-STATIC) --shared-lib=$(FINDLIBS-SHARED)
 }
 
-''' % sys.executable.replace('\\', '\\\\'))
+''' % sys.executable.replace('\\', '/'))
 
 def set_expected(t, markup):
   verbose = "True" if t.verbose else "False"
diff --git a/test/core_jamshell.py b/test/core_jamshell.py
index e1c0722802..68a6551e7b 100644
--- a/test/core_jamshell.py
+++ b/test/core_jamshell.py
@@ -45,7 +45,7 @@
 DEPENDS all : test-raw test-raw-fail test-py ;
 """)
 
-t.run_build_system(["-ffile.jam", "-d1", "-sPYTHON=" + sys.executable], status=1)
+t.run_build_system(["-ffile.jam", "-d1", '-sPYTHON="' + sys.executable + '"'], status=1)
 t.expect_output_lines([
     "...failed run test-raw-fail...",
     "0,1,2",
diff --git a/test/toolset-mock/project-config.jam b/test/toolset-mock/project-config.jam
index 82802f143b..ded8d78bdb 100644
--- a/test/toolset-mock/project-config.jam
+++ b/test/toolset-mock/project-config.jam
@@ -33,6 +33,6 @@ using intel-darwin  : 10.2  : $(PYTHON) $(here)/src/intel-darwin-10.2.py : $(ar)
 # TODO: msvc toolset should not require this env variable to be presented
 modules.poke .ENVIRON : PROCESSOR_ARCHITEW6432 : amd64 ;
 using msvc : 14.3 : :
-    "<compiler>$(PYTHON) $(here)/src/msvc-14.3.py"
-    "<linker>$(PYTHON) $(here)/src/linkx.py"
+    <compiler>\"$(PYTHON)\"\ \"$(here)/src/msvc-14.3.py\"
+    <linker>\"$(PYTHON)\"\ \"$(here)/src/linkx.py\"
   ;