diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index c5a07289f4..7176912e1f 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -9,6 +9,7 @@ add_subdirectory(LibEDID)
 add_subdirectory(LibELF)
 add_subdirectory(LibGfx)
 add_subdirectory(LibGL)
+add_subdirectory(LibGLSL)
 add_subdirectory(LibIMAP)
 add_subdirectory(LibJS)
 add_subdirectory(LibLocale)
diff --git a/Tests/LibGLSL/CMakeLists.txt b/Tests/LibGLSL/CMakeLists.txt
new file mode 100644
index 0000000000..6edeb7549d
--- /dev/null
+++ b/Tests/LibGLSL/CMakeLists.txt
@@ -0,0 +1,7 @@
+set(TEST_SOURCES
+    test-parser.cpp
+)
+
+foreach(source IN LISTS TEST_SOURCES)
+    serenity_test("${source}" LibGLSL LIBS LibGLSL)
+endforeach()
diff --git a/Tests/LibGLSL/test-parser.cpp b/Tests/LibGLSL/test-parser.cpp
new file mode 100644
index 0000000000..2a32a514fe
--- /dev/null
+++ b/Tests/LibGLSL/test-parser.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2021, Itamar S. <itamar8910@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/LexicalPath.h>
+#include <AK/MemoryStream.h>
+#include <LibCore/Directory.h>
+#include <LibCore/File.h>
+#include <LibGLSL/Parser.h>
+#include <LibTest/TestCase.h>
+
+constexpr StringView TESTS_ROOT_DIR = "/home/anon/Tests/glsl-tests/parser"sv;
+
+static String read_all(String const& path)
+{
+    auto file = MUST(Core::File::open(path, Core::File::OpenMode::Read));
+    auto file_size = MUST(file->size());
+    return MUST(String::from_stream(*file, file_size));
+}
+
+TEST_CASE(test_regression)
+{
+    MUST(Core::Directory::for_each_entry(TESTS_ROOT_DIR, Core::DirIterator::Flags::SkipDots, [](auto const& entry, auto const& directory) -> ErrorOr<IterationDecision> {
+        auto path = LexicalPath::join(directory.path().string(), entry.name);
+        if (!path.has_extension(".glsl"sv))
+            return IterationDecision::Continue;
+
+        outln("Checking {}...", path.basename());
+        String file_path = MUST(String::from_deprecated_string(path.string()));
+
+        auto ast_file_path = MUST(String::formatted("{}.ast", MUST(file_path.substring_from_byte_offset(0, file_path.bytes_as_string_view().length() - sizeof(".glsl") + 1))));
+
+        auto source = read_all(file_path);
+        auto target_ast = read_all(ast_file_path);
+
+        GLSL::Preprocessor preprocessor(file_path, source);
+        GLSL::Parser parser(MUST(preprocessor.process_and_lex()), file_path);
+        auto root = MUST(parser.parse());
+
+        EXPECT(parser.errors().is_empty());
+
+        Vector<uint8_t> memory;
+        memory.resize(8 * 1024 * 1024);
+        AK::FixedMemoryStream output_stream(memory.span());
+
+        MUST(root->dump(output_stream));
+
+        auto written_bytes = MUST(output_stream.tell());
+        MUST(output_stream.seek(0));
+
+        String content = MUST(String::from_stream(output_stream, written_bytes));
+
+        auto equal = content == target_ast;
+        EXPECT(equal);
+        if (!equal)
+            outln("Failed on {}", path.basename());
+        return IterationDecision::Continue;
+    }));
+}
diff --git a/Userland/Libraries/LibGLSL/CMakeLists.txt b/Userland/Libraries/LibGLSL/CMakeLists.txt
index 0e98f691c8..ec4a4daa73 100644
--- a/Userland/Libraries/LibGLSL/CMakeLists.txt
+++ b/Userland/Libraries/LibGLSL/CMakeLists.txt
@@ -10,3 +10,5 @@ set(SOURCES
 
 serenity_lib(LibGLSL glsl)
 target_link_libraries(LibGLSL PRIVATE LibGPU)
+
+install(DIRECTORY Tests/ DESTINATION home/anon/Tests/glsl-tests)
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/discard.ast b/Userland/Libraries/LibGLSL/Tests/parser/discard.ast
new file mode 100644
index 0000000000..40b6b04956
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/discard.ast
@@ -0,0 +1,11 @@
+TranslationUnit[0:0->3:0]
+  FunctionDeclaration[0:0->3:0]
+    Type[0:0->0:3]
+      void
+    foo
+    (
+    )
+    FunctionDefinition[1:0->3:0]
+    {
+      DiscardStatement[2:4->2:11]
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/discard.glsl b/Userland/Libraries/LibGLSL/Tests/parser/discard.glsl
new file mode 100644
index 0000000000..d45f744afe
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/discard.glsl
@@ -0,0 +1,5 @@
+void foo()
+{
+    discard;
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/expression.ast b/Userland/Libraries/LibGLSL/Tests/parser/expression.ast
new file mode 100644
index 0000000000..7f0b8fa60b
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/expression.ast
@@ -0,0 +1,63 @@
+TranslationUnit[0:0->3:0]
+  FunctionDeclaration[0:0->3:0]
+    Type[0:0->0:3]
+      void
+    foo
+    (
+    )
+    FunctionDefinition[1:0->3:0]
+    {
+      VariableDeclaration[2:4->2:66]
+        Type[2:4->2:6]
+          int
+        a
+        BinaryExpression[2:12->2:66]
+          BinaryExpression[2:12->2:57]
+            BinaryExpression[2:12->2:48]
+              BinaryExpression[2:12->2:36]
+                BinaryExpression[2:12->2:22]
+                  NumericLiteral[2:12->2:12]
+                    1
+                  +
+                  BinaryExpression[2:16->2:22]
+                    NumericLiteral[2:16->2:16]
+                      2
+                    *
+                    NumericLiteral[2:20->2:20]
+                      3
+                +
+                BinaryExpression[2:24->2:36]
+                  BinaryExpression[2:25->2:30]
+                    NumericLiteral[2:25->2:25]
+                      4
+                    -
+                    NumericLiteral[2:29->2:29]
+                      2
+                  /
+                  NumericLiteral[2:34->2:34]
+                    2
+              +
+              FunctionCall[2:38->2:48]
+                Name[2:38->2:40]
+                  max
+                (
+                NumericLiteral[2:42->2:42]
+                  7
+                NumericLiteral[2:45->2:45]
+                  8
+                )
+            -
+            MemberExpression[2:50->2:57]
+              Name[2:50->2:52]
+                bar
+              Name[2:54->2:55]
+                xy
+          +
+          ArrayElementExpression[2:59->2:66]
+            Name[2:59->2:61]
+              abc
+            [
+            NumericLiteral[2:63->2:64]
+              13
+            ]
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/expression.glsl b/Userland/Libraries/LibGLSL/Tests/parser/expression.glsl
new file mode 100644
index 0000000000..dd1d0125ae
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/expression.glsl
@@ -0,0 +1,5 @@
+void foo()
+{
+    int a = 1 + 2 * 3 + (4 - 2) / 2 + max(7, 8) - bar.xy + abc[13];
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/for-statement.ast b/Userland/Libraries/LibGLSL/Tests/parser/for-statement.ast
new file mode 100644
index 0000000000..8550eda3a9
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/for-statement.ast
@@ -0,0 +1,37 @@
+TranslationUnit[0:0->5:0]
+  FunctionDeclaration[0:0->5:0]
+    Type[0:0->0:3]
+      void
+    main
+    (
+    )
+    FunctionDefinition[1:0->5:0]
+    {
+      VariableDeclaration[2:4->2:13]
+        Type[2:4->2:6]
+          int
+        b
+        NumericLiteral[2:12->2:12]
+          0
+      ForStatement[3:4->4:11]
+      Initializer:
+        VariableDeclaration[3:9->3:18]
+          Type[3:9->3:11]
+            int
+          a
+          NumericLiteral[3:17->3:17]
+            0
+      Test expression:
+        BooleanLiteral[3:20->3:23]
+          true
+      Update expression:
+        UnaryExpression[3:26->3:29]
+          postfix ++
+          Name[3:26->3:26]
+            a
+      Body:
+        UnaryExpression[4:8->4:11]
+          postfix ++
+          Name[4:8->4:8]
+            b
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/for-statement.glsl b/Userland/Libraries/LibGLSL/Tests/parser/for-statement.glsl
new file mode 100644
index 0000000000..c4407621ca
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/for-statement.glsl
@@ -0,0 +1,7 @@
+void main()
+{
+    int b = 0;
+    for (int a = 0; true; a++)
+        b++;
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/function-declaration.ast b/Userland/Libraries/LibGLSL/Tests/parser/function-declaration.ast
new file mode 100644
index 0000000000..1a4146188a
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/function-declaration.ast
@@ -0,0 +1,15 @@
+TranslationUnit[0:0->0:24]
+  FunctionDeclaration[0:0->0:24]
+    Type[0:0->0:2]
+      int
+    main
+    (
+    Parameter[0:9->0:13]
+    a
+      Type[0:9->0:11]
+        int
+    Parameter[0:16->0:22]
+    b
+      Type[0:16->0:20]
+        float
+    )
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/function-declaration.glsl b/Userland/Libraries/LibGLSL/Tests/parser/function-declaration.glsl
new file mode 100644
index 0000000000..8faf42093a
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/function-declaration.glsl
@@ -0,0 +1,2 @@
+int main(int a, float b);
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/function-definition.ast b/Userland/Libraries/LibGLSL/Tests/parser/function-definition.ast
new file mode 100644
index 0000000000..95ea1ed6ae
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/function-definition.ast
@@ -0,0 +1,13 @@
+TranslationUnit[0:0->3:0]
+  FunctionDeclaration[0:0->3:0]
+    Type[0:0->0:2]
+      int
+    main
+    (
+    )
+    FunctionDefinition[1:0->3:0]
+    {
+      ReturnStatement[2:1->2:9]
+        NumericLiteral[2:8->2:8]
+          1
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/function-definition.glsl b/Userland/Libraries/LibGLSL/Tests/parser/function-definition.glsl
new file mode 100644
index 0000000000..89e00ff1cc
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/function-definition.glsl
@@ -0,0 +1,5 @@
+int main()
+{
+	return 1;
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/if-else.ast b/Userland/Libraries/LibGLSL/Tests/parser/if-else.ast
new file mode 100644
index 0000000000..b3b6cc9abf
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/if-else.ast
@@ -0,0 +1,26 @@
+TranslationUnit[0:0->6:0]
+  FunctionDeclaration[0:0->6:0]
+    Type[0:0->0:3]
+      bool
+    foo
+    (
+    )
+    FunctionDefinition[1:0->6:0]
+    {
+      IfStatement[2:4->5:20]
+        Predicate:
+        BinaryExpression[2:8->2:14]
+          NumericLiteral[2:8->2:8]
+            1
+          ==
+          NumericLiteral[2:13->2:13]
+            2
+        Then:
+        ReturnStatement[3:8->3:19]
+          BooleanLiteral[3:15->3:18]
+            true
+        Else:
+        ReturnStatement[5:8->5:20]
+          BooleanLiteral[5:15->5:19]
+            false
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/if-else.glsl b/Userland/Libraries/LibGLSL/Tests/parser/if-else.glsl
new file mode 100644
index 0000000000..17daeeeef7
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/if-else.glsl
@@ -0,0 +1,8 @@
+bool foo()
+{
+    if (1 == 2)
+        return true;
+    else
+        return false;
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/return.ast b/Userland/Libraries/LibGLSL/Tests/parser/return.ast
new file mode 100644
index 0000000000..03b525274d
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/return.ast
@@ -0,0 +1,23 @@
+TranslationUnit[0:0->8:0]
+  FunctionDeclaration[0:0->3:0]
+    Type[0:0->0:3]
+      void
+    foo
+    (
+    )
+    FunctionDefinition[1:0->3:0]
+    {
+      ReturnStatement[2:4->2:10]
+    }
+  FunctionDeclaration[5:0->8:0]
+    Type[5:0->5:2]
+      int
+    bar
+    (
+    )
+    FunctionDefinition[6:0->8:0]
+    {
+      ReturnStatement[7:4->7:12]
+        NumericLiteral[7:11->7:11]
+          3
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/return.glsl b/Userland/Libraries/LibGLSL/Tests/parser/return.glsl
new file mode 100644
index 0000000000..6ce3d51f0f
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/return.glsl
@@ -0,0 +1,10 @@
+void foo()
+{
+    return;
+}
+
+int bar()
+{
+    return 3;
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/struct.ast b/Userland/Libraries/LibGLSL/Tests/parser/struct.ast
new file mode 100644
index 0000000000..dccb9c19f7
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/struct.ast
@@ -0,0 +1,7 @@
+TranslationUnit[0:0->3:1]
+  StructDeclaration[0:7->3:1]
+    foo
+    VariableDeclaration[2:4->3:0]
+      Type[2:4->2:6]
+        int
+      bar
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/struct.glsl b/Userland/Libraries/LibGLSL/Tests/parser/struct.glsl
new file mode 100644
index 0000000000..b2bd8f21fa
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/struct.glsl
@@ -0,0 +1,5 @@
+struct foo
+{
+    int bar;
+};
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/unary-expression.ast b/Userland/Libraries/LibGLSL/Tests/parser/unary-expression.ast
new file mode 100644
index 0000000000..9b15b20631
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/unary-expression.ast
@@ -0,0 +1,32 @@
+TranslationUnit[0:0->4:0]
+  FunctionDeclaration[0:0->4:0]
+    Type[0:0->0:3]
+      void
+    foo
+    (
+    )
+    FunctionDefinition[1:0->4:0]
+    {
+      VariableDeclaration[2:4->2:13]
+        Type[2:4->2:6]
+          int
+        a
+        NumericLiteral[2:12->2:12]
+          7
+      VariableDeclaration[3:4->3:22]
+        Type[3:4->3:6]
+          int
+        b
+        UnaryExpression[3:12->3:22]
+          prefix ~
+          UnaryExpression[3:14->3:21]
+            prefix !
+            UnaryExpression[3:15->3:21]
+              prefix ~
+              UnaryExpression[3:16->3:21]
+                prefix ++
+                UnaryExpression[3:18->3:21]
+                  postfix ++
+                  Name[3:18->3:18]
+                    a
+    }
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/unary-expression.glsl b/Userland/Libraries/LibGLSL/Tests/parser/unary-expression.glsl
new file mode 100644
index 0000000000..a6029f6235
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/unary-expression.glsl
@@ -0,0 +1,6 @@
+void foo()
+{
+    int a = 7;
+    int b = ~(!~++a++);
+}
+
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/variable-declaration.ast b/Userland/Libraries/LibGLSL/Tests/parser/variable-declaration.ast
new file mode 100644
index 0000000000..1bc106a3b0
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/variable-declaration.ast
@@ -0,0 +1,13 @@
+TranslationUnit[0:0->2:16]
+  VariableDeclaration[0:0->1:0]
+    Type[0:0->0:11]
+      uniform vec3
+    u_Color
+  VariableDeclaration[1:0->2:0]
+    Type[1:0->1:6]
+      in vec3
+    i_VertexColor
+  VariableDeclaration[2:0->2:16]
+    Type[2:0->2:7]
+      out vec4
+    o_Color
diff --git a/Userland/Libraries/LibGLSL/Tests/parser/variable-declaration.glsl b/Userland/Libraries/LibGLSL/Tests/parser/variable-declaration.glsl
new file mode 100644
index 0000000000..74c5710356
--- /dev/null
+++ b/Userland/Libraries/LibGLSL/Tests/parser/variable-declaration.glsl
@@ -0,0 +1,4 @@
+uniform vec3 u_Color;
+in vec3 i_VertexColor;
+out vec4 o_Color;
+