diff --git a/src/libraries/System.Security.Permissions/tests/EvidenceBaseTests.cs b/src/libraries/System.Security.Permissions/tests/EvidenceBaseTests.cs
index 9eea6a3dc41bff..ba17fea6bb286b 100644
--- a/src/libraries/System.Security.Permissions/tests/EvidenceBaseTests.cs
+++ b/src/libraries/System.Security.Permissions/tests/EvidenceBaseTests.cs
@@ -39,6 +39,7 @@ public static void GacInstalledCallMethods()
}
[Fact]
+ [PlatformSpecific(~TestPlatforms.Browser)] // System.Security.Cryptography.Algorithms is not supported on this platform.
public static void HashCallMethods()
{
Hash hash = new Hash(Reflection.Assembly.Load(new Reflection.AssemblyName("System.Reflection")));
diff --git a/src/libraries/System.Security.Permissions/tests/MembershipConditionTests.cs b/src/libraries/System.Security.Permissions/tests/MembershipConditionTests.cs
index d9758dcbaaf617..660661c1520f30 100644
--- a/src/libraries/System.Security.Permissions/tests/MembershipConditionTests.cs
+++ b/src/libraries/System.Security.Permissions/tests/MembershipConditionTests.cs
@@ -61,6 +61,7 @@ public static void GacMembershipConditionCallMethods()
}
[Fact]
+ [PlatformSpecific(~TestPlatforms.Browser)] // System.Security.Cryptography.Algorithms is not supported on this platform.
public static void HashMembershipConditionCallMethods()
{
HashMembershipCondition hmc = new HashMembershipCondition(Cryptography.SHA1.Create(), new byte[1]);
@@ -78,6 +79,7 @@ public static void HashMembershipConditionCallMethods()
}
[Fact]
+ [PlatformSpecific(~TestPlatforms.Browser)] // System.Security.Cryptography.X509Certificates is not supported on this platform.
public static void PublisherMembershipConditionCallMethods()
{
PublisherMembershipCondition pmc = new PublisherMembershipCondition(new System.Security.Cryptography.X509Certificates.X509Certificate());
diff --git a/src/libraries/System.Security.Permissions/tests/PermissionTests.cs b/src/libraries/System.Security.Permissions/tests/PermissionTests.cs
index 9889feffb6dc35..d09b48f343a567 100644
--- a/src/libraries/System.Security.Permissions/tests/PermissionTests.cs
+++ b/src/libraries/System.Security.Permissions/tests/PermissionTests.cs
@@ -210,6 +210,7 @@ public static void PrincipalPermissionCallMethods()
}
[Fact]
+ [PlatformSpecific(~TestPlatforms.Browser)] // System.Security.Cryptography.X509Certificates is not supported on this platform.
public static void PublisherIdentityPermissionCallMethods()
{
PublisherIdentityPermission pip = new PublisherIdentityPermission(new System.Security.Cryptography.X509Certificates.X509Certificate());
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index fdd0e1e851169b..871aae867b8bd8 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -38,9 +38,6 @@
-
-
-