diff --git a/clang-tools-extra/test/clangd/Inputs/sstream.h b/clang-tools-extra/test/clangd/Inputs/sstream.h
new file mode 100644
index 000000000000..980963ace620
--- /dev/null
+++ b/clang-tools-extra/test/clangd/Inputs/sstream.h
@@ -0,0 +1,3 @@
+namespace std {
+class basic_ostringstream {};
+}
diff --git a/clang-tools-extra/test/clangd/symbols.test b/clang-tools-extra/test/clangd/symbols.test
index adc73fbd3ae9..015c8d50aa47 100644
--- a/clang-tools-extra/test/clangd/symbols.test
+++ b/clang-tools-extra/test/clangd/symbols.test
@@ -1,7 +1,7 @@
-# RUN: clangd -lit-test < %s | FileCheck %s
+# RUN: env CPATH=%S/Inputs clangd -lit-test < %s | FileCheck %s
 {"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{"workspace":{"symbol":{"symbolKind":{"valueSet": [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]}}}},"trace":"off"}}
 ---
-{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"#include <sstream>\nvoid foo(); int main() { foo(); }\n"}}}
+{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"#include <sstream.h>\nvoid foo(); int main() { foo(); }\n"}}}
 ---
 {"jsonrpc":"2.0","id":1,"method":"workspace/symbol","params":{"query":"std::basic_ostringstream"}}
 #      CHECK:  "id": 1,
@@ -21,7 +21,7 @@
 # CHECK-NEXT:              "line": {{.*}}
 # CHECK-NEXT:            }
 # CHECK-NEXT:          },
-# CHECK-NEXT:          "uri": "file://{{.*}}/sstream"
+# CHECK-NEXT:          "uri": "file://{{.*}}/sstream.h"
 # CHECK-NEXT:        },
 # CHECK-NEXT:        "name": "basic_ostringstream"
 # CHECK-NEXT:      }