diff --git a/templates/vsprojects/buildtests_c.sln.template b/templates/vsprojects/buildtests_c.sln.template
index e9438bed22f754a34979306f95680a4df35b6414..a985fea64ddcb9ade3ded5360fd77c1b5967ae42 100644
--- a/templates/vsprojects/buildtests_c.sln.template
+++ b/templates/vsprojects/buildtests_c.sln.template
@@ -2,6 +2,6 @@
 --- |
   <%namespace file="sln_defs.include" import="gen_solution"/>\
   <%
-  solution_projects = [p for p in vsprojects if p.build != 'protoc' and p.language == 'c' and not p.boringssl]
+  solution_projects = [p for p in vsprojects if p.build != 'protoc' and p.language == 'c' and not p.boringssl and not p.zlib]
   %>\
   ${gen_solution(solution_projects, use_dlls='yes')}
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index 9a7d1e0a19480df1d2d9e7d485c792cfe1d42ba2..3996c5635b2657d15eb590e07d48931d70d6b632 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -75,11 +75,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "test_tcp_server", "vcxproj\
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "z", "vcxproj\.\z\z.vcxproj", "{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}"
-	ProjectSection(myProperties) = preProject
-        	lib = "True"
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "bad_client_test", "vcxproj\test/bad_client\bad_client_test\bad_client_test.vcxproj", "{BA67B418-B699-E41A-9CC4-0279C49481A5}"
 	ProjectSection(myProperties) = preProject
         	lib = "True"
@@ -1429,22 +1424,6 @@ Global
 		{E3110C46-A148-FF65-08FD-3324829BE7FE}.Release-DLL|Win32.Build.0 = Release|Win32
 		{E3110C46-A148-FF65-08FD-3324829BE7FE}.Release-DLL|x64.ActiveCfg = Release|x64
 		{E3110C46-A148-FF65-08FD-3324829BE7FE}.Release-DLL|x64.Build.0 = Release|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug|Win32.ActiveCfg = Debug|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug|x64.ActiveCfg = Debug|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release|Win32.ActiveCfg = Release|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release|x64.ActiveCfg = Release|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug|Win32.Build.0 = Debug|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug|x64.Build.0 = Debug|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release|Win32.Build.0 = Release|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release|x64.Build.0 = Release|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Debug-DLL|x64.Build.0 = Debug|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release-DLL|Win32.Build.0 = Release|Win32
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release-DLL|x64.ActiveCfg = Release|x64
-		{FBADE9E3-6A3F-36D3-D676-C1B808451DD7}.Release-DLL|x64.Build.0 = Release|x64
 		{BA67B418-B699-E41A-9CC4-0279C49481A5}.Debug|Win32.ActiveCfg = Debug|Win32
 		{BA67B418-B699-E41A-9CC4-0279C49481A5}.Debug|x64.ActiveCfg = Debug|x64
 		{BA67B418-B699-E41A-9CC4-0279C49481A5}.Release|Win32.ActiveCfg = Release|Win32